1. The sound intensity level will the rescue (that searching for Andrew, a geologist who was stranded while conducting research in the mountains of Colorado) team measure from the frightened researcher = 2.82 x 10–⁶ W/m²
2. The bulk modulus B of air = 1.46 x 10⁵ Pa
The energy of the wave between the order per unit area of the same is what determines how loud a sound is. The energy is computed by integrating the mechanical energy over a period, where's' is the sound wave's amplitude and the mass is affected by density.
The intensity of the wave:
I = 2 π² f²A²v ρ
= 2 π² (450)² (4.00 x 10–⁸)² (332) (1.33)
= 2.82 x 10–⁶
The bulk modulus:
B = v²ρ
= (332)² (1.33)
= 1.46 x 10⁵ Pa
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You throw a 5.0 kg stone from the top of a cliff with an initial vertical velocity of 8.0 m/s downward and an initial horizontal velocity of 7.0 m/s away from the cliff, and it feels no air resistance. After the stone is in the air but free of your hand, its acceleration remains constant at 9.8 m/s^2 downward but its speed changes.
True
False
Throwing a 5kg stone with an initial vertical velocity of 8.0 m/s downward and an initial horizontal velocity of 7.0 m/s away from the cliff, without any air resistance. After the stone is in the air, its acceleration remains constant at 9.8 m/s² downward but its speed changes. The statement is true.
Once the stone is released from your hand, it will experience a constant acceleration of 9.8 m/s² downward due to the force of gravity. This means that its speed will change over time as it falls.
In the vertical direction, its speed will increase at a rate of 9.8 m/s², so it will be moving faster and faster as it falls. In the horizontal direction, the stone will continue to move with a constant velocity of 7.0 m/s, as there is no force acting in that direction to change its speed.
The motion of the stone can be analyzed using kinematic equations, which describe the relationships between distance, time, acceleration, and velocity. The equations for motion in one dimension (vertical) are:
d = vit + (1/2)at²
vf = vi + at
where d is the distance traveled, vi and vf are the initial and final velocities, a is the acceleration, and t is time. Using these equations, you can calculate the stone's speed and distance fallen at any point in time.
In summary, the stone will experience a constant acceleration of 9.8 m/s² downward due to gravity once it is released from your hand, and its speed will change over time as it falls.
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climbing ropes stretch when they catch a falling climber, thus increasing the time it takes the climber to come to rest and reducing the force on the climber. in one standardized test of ropes, an 80 kg mass falls 4.8 m before being caught by a 2.5-m -long rope.
The force on the force sensor can be calculated as 2.25 kg x 9.8 m/s² = 22.05 kg If the ramp angle is 90 degrees and the cart mass is 2.25 kg,
Then the force on the force sensor can be predicted using a simple equation. The force on the force sensor is equal to the mass of the cart multiplied by the acceleration due to gravity, which is 9.8 m/s². Therefore, the force on the force sensor can be calculated as 2.25 kg x 9.8 m/s² = 22.05 kg. This means that the force on the force sensor when the ramp angle is 90 degrees and the cart mass is 2.25 kg will be 22.05 kg. This calculation is based on the assumption that there is no friction or other external force acting on the cart. If there are other external forces such as friction, then the force on the force sensor may change.
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car bumpers are designed to limit the extent of damage to the car in the case of low-velocity collisions. consider a 3600 lb passenger car impacting a concrete barrier while traveling at a speed of 4.0 mph. model the car as a particle, and consider two types of bumpers: (1) a simple linear spring with constant k and (2) a linear spring of constant k in parallel with a shock-absorbing unit generating a nearly constant force of 700 lb over 0.25 ft.
k = _____ x 10^4 lb/ft
k = 2.8 x 104 lb/ft. is a constant-length linear spring that is parallel to a 700 lb over force-generating shock absorber.
A velocities simple definition is what?The main determinant of an object's position and rate of motion is its velocity. It can be explained as the distance an object travels in one unit of time. The dispersion of the objects in a given amount of time is referred to as velocity. Vector sum (v) squared is equal to the sum of the beginning velocity (u) squared and the acceleration (a) times the displacement times two (s). In order to find v, we solve for v such that final velocity (v) = numerator of speed (u) divided plus two times accelerated (a) twice displacement (s).
To calculate kinetic energy of the car KE = (1/2)mv^2
to convert the mass of the car he velocity from mph to ft/s (1 mph = 1.47 ft/s), we get :KE = (1/2)(3600/32.2)(4.0 x 1.47)^2
KE = 13325 ft-lb, the potential energy will be calculated as PE = (1/2)kx^2
since the displacement of the spring is unknown, we can express it in terms of k and solve for k using the given information
we know that constant force of 700 lb is generated over a displacement of 0.25 ft.W = Fd
W = 700 lb x 0.25 ft
W = 175 ft-lb
e can equate the two expressions for potential energy and solve for k:
(1/2)kx^2 = 175
For the bumper with the shock-absorbing unit, the displacement x is 0.25 ft, so we get:
1/2)k(0.25)^2 = 175
k = 280000 Ib/ft
Therefore, the value of k for the simple linear spring is k = 2.8 x 10^4 lb/ft.
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The electric field strength between the plates of a simple air capacitor is equal to the voltage across the plates divided by the distance between them. When a voltage of 89.6 V is put across the plates of such a capacitor an electric field strength of 1.8kV/cm
is measured.
Write an equation that will let you calculate the distance d between the plates. Your equation should contain only symbols.
The equation to calculate the distance between the plates of a capacitor can be derived from the given information:
Electric field strength (E) = Voltage (V) / Distance between plates (d)
Given that the electric field strength is 1.8 kV/cm and the voltage is 89.6 V, we can substitute these values in the equation:
[tex]1.8 kV/cm = 89.6 V / d[/tex]
To solve for the distance d, we can rearrange the equation:
[tex]d = 89.6 V / (1.8 kV/cm)[/tex]
Here, the voltage is expressed in volts and the distance is expressed in centimeters. This equation can be used to calculate the distance between the plates of the capacitor, given the voltage and the electric field strength.
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According to Kirchhoff’s voltage law, the algebraic sum of the voltage around a closed loop in a circuit must be:
Zero
Negative
Unknown
Positive
According to Kirchhoff’s voltage law, the algebraic sum of the voltage around a closed loop in a circuit must be zero which is therefore denoted as option A.
What is Voltage?This is also known as electric pressure, electric tension, or potential difference, and it is referred to as the difference in electric potential between two points.
Kirchhoff's Voltage Law states that the voltage around a loop equals the sum of every voltage drop in the same loop for any closed network and equals zero as a result of the absence of breaks.
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To help psychologists separate uninformed opinions from examined conclusions, psychologists ________ to conduct research.
use hindsight bias
use overconfidence
perceive patterns in random events
use the scientific method
To help psychologists separate uninformed opinions from examined conclusions, psychologists use the scientific method to conduct research. Thus, the correct option for this question is D.
What is the Scientific method?The scientific method may be defined as the process of objectively establishing facts through testing and experimentation.
The basic process involves making an observation, forming a hypothesis, making a prediction, conducting an experiment, and finally analyzing the results.
Psychologists generally employ the scientific method before stating the question, offering a theory, and then constructing rigorous laboratory or field experiments to test the hypothesis.
Therefore, to help psychologists separate uninformed opinions from examined conclusions, psychologists use the scientific method to conduct research. Thus, the correct option for this question is D.
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a rod of length 2a with total charge q uniformly distributed along its length is placed along the z axis with its center at the origin. find the electric field everywhere.
The electric field due to a charged rod of length 2a with total charge q uniformly distributed along its length, placed along the z axis with its center at the origin.
To find the electric field everywhere due to the charged rod, we can use Coulomb's law and the principle of superposition. The electric field due to a small segment of the rod at a point P in space is given by:
dE = k dq / r^2
where k is Coulomb's constant, dq is the charge on the segment, r is the distance from the segment to the point P, and dE is the electric field due to the segment. To find the total electric field at P, we integrate this expression over the entire length of the rod, from -a to +a, as follows:
E = ∫ dE = k ∫ dq / r^2
where the integral is taken over the length of the rod. We can express dq in terms of the charge density λ, which is the charge per unit length of the rod, as dq = λ ds, where ds is an infinitesimal length element along the rod. We can also express r in terms of the distance s from the origin to the segment, as r = √(s^2 + z^2), where z is the distance from the segment to the z axis.
Substituting these expressions into the integral, we obtain:
E = k ∫ dq / r^2 = k ∫ λ ds / (s^2 + z^2)
To evaluate this integral, we use a trigonometric substitution, letting s = z tan θ. Then, ds = z sec^2 θ dθ, and the limits of integration become -arctan(a/z) and arctan(a/z). Substituting these expressions into the integral, we obtain:
E = k λ z ∫_{-arctan(a/z)}^{arctan(a/z)} dθ / (1 + (a/z)^2 tan^2 θ)
This integral can be evaluated using the substitution u = tan θ, which gives:
E = k λ z / (2πε_0) ∫_{-a/z}^{a/z} du / (1 + u^2)
where ε_0 is the permittivity of free space. This integral can be evaluated using the inverse tangent function, giving:
E = k λ z / (2πε_0) [arctan(a/z) - arctan(-a/z)]
Simplifying this expression using the identity arctan(-x) = -arctan(x), we obtain:
E = k λ a / (2πε_0 z√(a^2 + z^2))
This is the expression for the electric field due to a charged rod of length 2a with total charge q uniformly distributed along its length, placed along the z axis with its center at the origin. The electric field points radially away from the rod, and its magnitude decreases as 1/r^2 with distance from the rod
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What branch of science examines the functions of living organisms and their parts?
Answer:
physiology
Explanation:
they examine the tissue and cell
suppose that it had taken longer for the solar wind to clear away the solar nebula. which of the following consequences would have been most likely?
Some ice-rich objects in the Kuiper belt (such as Pluto or Eris) would have grown to larger sizes these are consequences solar wind to clear away the solar nebula.
Eventually, 4 effects clear away the nebula: the Sun's radiation pressure, the solar wind, the gravitation of the individual planets, and close encounters between planets and planetessimals. METEORS, COMETS, ASTEROIDS are left as residues of the planet formation process. Theoretical models for the solar nebula indicate a decreasing temperature with increasing distance from the Sun.
Shock waves from the explosion compressed the cloud of gas and dust. Compression made the cloud collapse, as gravity pulled the gas and dust together, forming a solar nebula. Just like a dancer that spins faster as she pulls in her arms, the cloud began to spin as it collapsed
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Part A Find an expression for the minimum stopping distance dstop of a car traveling at speed vo if the driver's reaction time is Treact and the magnitude of the acceleration during maximum brak a constant abrake Express your answer in terms of the variables vo, Treact, and aprake. 190 ΑΣΦ Bra ? dstop Submit Request Answer Part B A car traveling at 30 m/s can stop in a distance of 70 m, including the distance traveled during the driver's reaction time of 0.50 s. What is the minimum stopping distance for the same car traveling at a speed of 46 m/s? Express your answer with the appropriate units. HA ? d = Value m Submit Request Answer
Part A, the minimum stopping distance for the car traveling at 46 m/s is 116 m. For the minimum stopping distance to find the minimum stopping distance for the car traveling at 46 m/s:
dstop = vo Treact + (vo^2)/(2abrake)
The minimum stopping distance of a car traveling at speed vo with a reaction time Treact and constant maximum braking acceleration abrake can be found by considering the distance traveled during the driver's reaction time and the distance traveled while the car is slowing down due to braking. The total stopping distance is given by:
dstop = dreact + dbrake
where dreact is the distance traveled during the driver's reaction time and dbrake is the distance traveled while the car is slowing down due to braking.
The distance traveled during the driver's reaction time is given by:
dreact = vo Treact
The distance traveled while the car is slowing down due to braking can be found using the kinematic equation:
v^2 = vo^2 + 2a(x - xo)
where v is the final velocity, xo is the initial position, x is the final position, and a is the acceleration. In this case, we want to find the distance traveled while the car is coming to a stop, so v = 0, xo = 0, and x = dbrake. Solving for dbrake, we get:
dbrake = (vo^2)/(2abrake)
Substituting this expression into the total stopping distance equation, we get:
dstop = vo Treact + (vo^2)/(2abrake)
This is the expression for the minimum stopping distance of a car traveling at speed vo with a reaction time Treact and constant maximum braking acceleration abrake.
Part B:
We can use the expression for the minimum stopping distance derived in Part A to find the minimum stopping distance of the car traveling at 46 m/s. We are given that the car traveling at 30 m/s can stop in a distance of 70 m, including the distance traveled during the driver's reaction time of 0.50 s. Using this information, we can find the value of abrake as follows:
dstop = vo Treact + (vo^2)/(2abrake)
70 m = (30 m/s)(0.50 s) + (30 m/s)^2/(2abrake)
Solving for abrake, we get:
abrake = (30 m/s)^2/(2(70 m - 15 m)) = 4.08 m/s^2
Note that we subtracted the distance traveled during the driver's reaction time of 0.50 s, which is 15 m, from the total stopping distance of 70 m to get the distance traveled while braking.
Now that we know the value of abrake, we can use the same expression for the minimum stopping distance to find the minimum stopping distance for the car traveling at 46 m/s:
dstop = vo Treact + (vo^2)/(2abrake)
dstop = (46 m/s)(0.50 s) + (46 m/s)^2/(2(4.08 m/s^2)) = 116 m
Therefore, the minimum stopping distance for the car traveling at 46 m/s is 116 m
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What is the missing part (yellow box) in each of these nuclear equations? Hint: Use the Periodic Table. The
answer will be a number or the symbol of an element. (6 pts)
A.
B.
C.
D.
40K →
19
e +
234
238 U → He +90
92
40
20
237 U₁e +3Np
92
93
4
230Th →→He+ Ra
90
88
35
35Sie + ³5 p
Answer:
Answer:
Answer:
Answer:
Answer:
Calcium is released from the breakdown of potassium ion. Thorium atom is released from the degradation of Uranium atom through alpha decay. The beta decay of Uranium form Neptunium. Radium is released from the alpha decay of thorium and P(15) is released from the beta decay of Silicon atom.
What are alpha and beta decay?Alpha decay is a common mode of radioactive decay in which a radioactive nucleus emits an alpha particle such as a helium-4 nucleus.
Beta decay is a common mode of radioactive decay in which the nucleus emits beta particles. The daughter nucleus in this decay will have a higher atomic number than the original nucleus.
Calcium is released from the breakdown of potassium ion. Thorium atom is released from the degradation of Uranium atom through alpha decay. The beta decay of Uranium form Neptunium. Radium is released from the alpha decay of thorium and Phosphorus(15) is released from the beta decay of Silicon atom.
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A hydrogen atom consists of a proton and an electron. a. Determine the potential energy of a hydrogen atom. Use 52.9pm as the distance between the proton and the electron. b. The electron is replaced by a muon which has a charge of −e and mass mμ =1.88×10^−28kg. Determine the potential energy of this muonic atom. Use 0.25pm as the distance between the proton and the muon.
a. The potential energy of a hydrogen atom is -2.18 x 10^-18 J. b. The potential energy of a muonic atom is -4.11 x 10^-11 J.
a. The potential energy of a hydrogen atom,
U = -k(q1*q2)/r
where k is the Coulomb constant, q1 and q2 are the charges of the particles, and r is the distance between them.
For a hydrogen atom, the proton has a charge of +e and the electron has a charge of -e, where e is the elementary charge.
U = -k(e^2)/(52.9 pm)
U = -2.18 x 10^-18 J
b. For a muonic atom, the charge of the electron is replaced by a muon with a charge of -e.
U = -k(e^2_muon)/(0.25 pm)
where e_muon = -e = -1.60 x 10^-19 C.
U = -4.11 x 10^-11 J
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Vegetable does not burn if we use while frying it, why?
Vegetable oil does not burn if we use it while frying it because liquid oil itself does not burn. Rather, it is the vapor from oil that has reached its boiling and vapor point that ignites.
Why does vegetable oil not burn?There are three things, for our purposes, to understand. The flash point, the fire point, and the ignition point. The ignition point is responsible for burning. To avoid oil burns, carefully and gently lower the food into the oil with your hands or tongs, and make sure that it drops away from you.
When oil starts to smoke it will impart a burnt, bitter flavor thanks to a substance released called acrolein. During this process, harmful compounds called polar compounds may also be released as a byproduct of the breakdown of that oil as it's exposed to heat.
Therefore, vegetable oil does not burn if we use it while frying it because liquid oil itself does not burn.
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FILL IN THE BLANK the semilunar valves will open when the pressure within the_____ exceeds the pressure within the ______ .
The semilunar valves will open when the pressure within the ventricles exceeds the pressure within the great arteries.
What are semilunar valves?The heart valve located at the base of the aorta and the pulmonary artery is known as a semilunar valve. It is made up of cusps or flaps that prevent the blood from flowing backwards during the systole phase of the heart's beat. The semilunar valves are responsible for controlling the flow of blood between the ventricles and the main arteries, which directs blood flow away from the heart and towards the organs that are necessary for survival.
Mitral and tricuspid valves prevent blood from flowing backwards into the atria. This is necessary because blood travels from the atria to the ventricles. Pressure differences between the chambers are the driving force behind the opening and closing of semilunar valves, which are controlled by how they are operated.
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A car traveling north velocity at 17.7 m/s. After 12 s, its velocity is 14.1 m/s in the same direction. Find the magnitude and direction of the car's average acceleration.
The magnitude and direction of the car's average acceleration is 0.3 m/s² to south. The result is obtained by using the formula for acceleration.
What is acceleration?An acceleration is a rate of change in velocity of an object with respect to time. It can be expressed as
a = Δv/Δt
Where
a = accelerationΔv = change in velocityΔt = change in timeA car is traveling north with a velocity of 17.7 m/s. After 12 s, its velocity becomes 14.1 m/s in the same direction.
Find the magnitude and direction of the car's average acceleration!
We have
v₁ = 17.7 m/sv₂ = 14.1 m/sΔt = 12 sThe acceleration can be calculated by the formula above.
a = Δv/Δt
a = (v₂ - v₁)/Δt
a = (14.1 - 17.7)/12
a = (-3.6)/12
a = - 0.3 m/s²
The magnitude of the acceleration is 0.3 m/s². While, the direction is the opposite of the car's motion. It's to south.
Hence, the car travels with an acceleration of 0.3 m/s² to south.
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Time value of money calculations can be solved using a mathematical equation, a financial calculator, or a spreadsheet. Which of the following equations can be used to solve for the present value of an ordinary annuity?
PMT x {1 - [1 / (1+r)n1+rn]} / r
The term "ordinary annuity" refers to the assumption made by the equation that payments are paid at the conclusion of each month.
The present value of an ordinary annuity may be calculated using the equation you've given.
PMT x 1 - [1 / (1+r)]n]r
In this case, PMT stands for the regular payment made at the end of each period, r for the interest rate per period, and n for the overall number of periods.
The present value of the annuity, which is the total present value of all the future payments, is determined by the numerator of the equation.
To account for the time value of money, the denominator of the equation determines the present value of one dollar.
The term "ordinary annuity" refers to the assumption made by the equation that payments will be made at the conclusion of each period.
The equation would have to be modified if the payments were made at the start of each period.
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Given the following HMM model, where symbols X, Y and Z represent the possible observations in the states. In a circle representing a state, the symbols are equally possible observations in that state. How much is P(01 = X,O2 = X, 03 = Z S1S3S3)? 1/3 S2 1/3 XY ZY 2/3 213 ZX 1/3 1/3 1/3 (There are 3 nodes XY, ZY, ZX with the following configuration: XY is in state 51 and has a directed edge from XY to ZY with weight 1/3; there is another directed edge from XY to ZX with weight 2/3; ZY is in state 52 and has a directed edge from ZY to ZX with weight 2/3; there is a directed edge from ZY to XY with weight ZX is state and there is a self loop at ZX with weight 1/3; there is a directed edge from ZX to ZY with weight 1/3; there is a directed edge from ZX to XY with weight 1/3.) 2/3 1/8 14 12
In the given HMM Model, the value of the P ( O1 = X, O2 = X, O3 = Z | S1 S2 S3 ) = 2/3.
HMM :
HMM or Hidden Markov Model is used for state estimation, determining the most probable path and finding the most likelihood HMM that could have produced a string of observations given by O1, O2...OT.
In the light of the below conversations, the result to the given set of questions are as follows
Clearly,
O1 = X => S1 ;
O2 = X => S1 ;
O3 = Z => S3 .
Hence, the transition is from state S1 to state S3.
Now, as per given diagram :
S1 -> S3 = 2/3 as denoted by the green edge from S1 to S3.
Therefore, P ( O1 = X, O2 = X, O3 = Z | S1 S2 S3 ) = 2/3.
This concludes the answer to all corridor of the question along with the necessary explanations.
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a 50-kg rock climber accidently falls from the side of a rock and free falls until they are stopped by their 9-m safety rope. assuming the rope stops them completely, with no rebound, what is the impulse imparted on their body by the rope.
The velocity immediately following is zero since there was no rebound. 665 kg/s.
What does it mean when something is "freely falling"?In free fall, an object drops steadily. The speed of something falling freely is constant. There is no resistance to the object's descent caused by gravity when it is in free fall. An object falling freely encounters air resistance in the absence of any additional resistance.
According to the given information:
The impulse is given by:
J = change in momentum
J=m(va−vb )
where
va=velocity after
vb=velocity before
The velocity just before is given by
vb=2∗9.81m/s 2∗9m(under root)
=13.3m/s(− j )
Because there were no rebound, the velocity immediately following is zero.
As a result, the impulse is equal to 50(0+13.3m/s(j) = 665kg..
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A 39,000kg boat is traveling at a speed of 2m/s. What is the kinetic energy (in joules) of the boat?
Answer:
KE = 78 J
Explanation:
The equations for heating a house use are are given giveby by Eqs. andce in a particular case can be written with time in hours as Th - To C (dT h )/dt = Ku - (Th -To)/R
where (a) Cis the thermal capacity of the house, BTU/°F. (b) Th is the temperature in the house, °F, (c) T0 is the temperature outside the house, (d) K is the heat rating of the furnace, 90,000 BTU/h, (e) R is the thermal resistance, °F per BTU/h, (0 istt furmace wichh fci on ifa is off. It is measured that, with the outside temperature at 32°F and the house at 60°F, the furnace raises the temperature 2°F in six min (0.1 h). With the furnace off, the house temperature falls 2°F in 40 min. What are the values of C and R for the house?
We can use the given equation for the temperature change in the house to determine the values of C and R:
Th - To C (dTh)/dt = Ku - (Th - To)/R
How to find temperature change?utilising the knowledge that the furnace raises the temperature by 2°F every 0.1 h, we can calculate the value of K/R:
K/R is equal to (Th-to)/(Ku-(Th-to)/R)
(Th - 60°F)/(90,000 BTU/h - (Th - 60°F)/R) = 2°F/0.1h
When we simplify and find R, we obtain:
R is calculated as (Th - 60°F)/(45,000 BTU/h - 0.5*(Th - 60°F)).
Next, we may calculate the value of C using the knowledge that, with the furnace off, the house temperature drops 2°F in 40 minutes (0.67 h):
C (dTh)/dt = -2°F/0.67h
Using a C-solve, we obtain:
-2°F/(0.67h dTh/dt) = C
We can solve for Th by substituting the value of R that we discovered before into the equation for K/R:
(Th - 60°F)/(90,000 BTU/h - (Th - 60°F)/R) = 2°F/0.1h
ThR - 60,000 + 90,000 Th - Th2 = 2,000 BTU
Th = 57.7°F or 62.3°F
We can use the temperature change information to determine which value of Th is the correct one. Since the furnace raises the temperature in the house, the correct value of Th is 62.3°F.
Substituting the values of Th, To, K, and R into the equation for C, we get:
C = -2°F/(0.67h × (dTh/dt))
C = -2°F/(0.67h × (62.3°F - 60°F)/(0.1h))
C = 167,910 BTU/°F
Substituting the values of Th, To, K, and R into the equation for R, we get:
R = (Th - 60°F)/(45,000 BTU/h - 0.5*(Th - 60°F))
R = (62.3°F - 60°F)/(45,000 BTU/h - 0.5*(62.3°F - 60°F))
R = 0.00038°F·h/BTU
Therefore, the values of C and R for the house are C = 167,910 BTU/°F and R = 0.00038°F·h/BTU.
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With what speed must a ball be thrown vertically from ground level to rise to a maximum height of 50 m? How long will it be in the air? Sketch graphs of y, v, and a versus t for the ball?
The ball must be thrown with a initial speed of 31.30 m/s from the ground level to rise it to a maximum height of 50m and it will in the air for 6.38 seconds.
Given, we have the distance ball needs to travel = 50m and we know that the final velocity at the maximum height when thrown vertically will be 0. And the acceleration will be 9.8m/s² which is acceleration due to Earth's gravity. Now, using the equations of motion we can find the initial velocity needed :
⇒ v² - u² = 2as where v stands for final velocity, u stands for initial velocity , s stands for the distance travelled and a stands for the acceleration. Therefore,
⇒ -u² = 2 x (-9.8m/s²) x 50m
⇒ u²= 980 (taking square roots on both sides of the equation)
⇒ u = 31.30 m/s
Now, we can easily find the duration for which the ball stays in the air using the equation v = u + at.
⇒ 0 = 31.30 + (-9.8)t (solve the equation for t)
⇒ 31.30 = 9.8t
⇒31.30 / 9.8 = t
⇒t = 3.19 seconds
Now, this is the time required by the ball to reach the maximum height, the total time for which the ball stays in air will be twice of this because we also have to take account of the time required by the ball to reach to the ground from the maximum height which is equal to the time we calculated since this is a free fall situation.
Therefore, total time for which the ball stays in the air after throwing it with a speed of 31.30 m/s : 2 x 3.19 seconds. The graphs are attached below.
⇒ 6.38 seconds
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consider a situation where a stationary object is subject to two force vectors, both trying to push it in different directions. adding these two vectors together gives you the resultant force vector (the total force vector acting on the object). if you wanted to place the object in equilibrium (where the total force vector is zero, and the object remains stationary) you would need to add a third force vector to also act on the object. call this third vector the equilibrium force vector.The equilibrium force vector is ______ in magnitude and ______ in direction to the resultant vector
The equilibrium force vector would need to be equal in magnitude and opposite in direction to the resultant force vector.
What is Equilibrium Force Vector?The equilibrium force vector is a third force vector that is added to a system in order to place it in a state of equilibrium. Equilibrium means that the net force acting on the system is zero, so the system remains at rest or moves with a constant velocity.
In general, the concept of an equilibrium force vector can be applied to any system that is subject to multiple forces or other influences, and the equilibrium force vector is the force that is needed to balance out those forces or influences and maintain a state of equilibrium. However, the concept of equilibrium and the equilibrium force vector remain useful for understanding and analysing the forces and dynamics of a system.
In the context of a stationary object subject to two force vectors, the equilibrium force vector is the force that is needed to balance out the other two forces so that the net force on the object is zero, and the object remains stationary in equilibrium. The magnitude and direction of the equilibrium force vector must be carefully calculated to ensure that it cancels out the net force on the object.
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Calculate the value of thc Gibbs Free Energy at 298 K for the conversion of A to B if the enthalpy of the reaction Is and the change in entropy is -26.8 J K^-1 mol^-1
The Gibbs Free Energy (ΔG) at 298 K for the conversion of A to B can be calculated using the equation ΔG = ΔH - TΔS.
Here, ΔH is the enthalpy of the reaction and ΔS is the change in entropy. Therefore, the Gibbs Free Energy for the conversion of A to B at 298 K is given by: ΔG = ΔH - (298 K)(-26.8 J K^-1 mol^-1)
Therefore, the value of the Gibbs Free Energy for the conversion of A to B at 298 K is equal to 7.54 kJ mol^-1. This value indicates that the conversion of A to B is thermodynamically favourable at 298 K, since the Gibbs Free Energy is negative.
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The Gibbs free energy is a thermodynamic potential in thermodynamics that can be used to determine the maximum amount of non-volume expansion work that a thermodynamically closed system is capable of performing at constant temperature and pressure.
The formula ΔG = ΔH - T ΔS can be used to determine the Gibbs Free Energy ( ΔG) at 298 K for the conversion of A to B.
Here, ΔH represents the reaction's enthalpy and ΔS represents the entropy change.
Therefore, 7.54 kJ mol^-1 is the value of the Gibbs Free Energy for the conversion of A to B at 298 K. Given that the Gibbs Free Energy is negative, this number shows that the conversion of A to B is thermodynamically advantageous at 298 K.
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Determine the force of gravitational attraction between the earth (m = 5.98×10(24)kg) and a 70 kg physics student if the student is in an airplane at 4.950 meters above the earth's surface.
At a height of 4.950 metres above the earth, the earth's gravitational pull on a 70 kg physics student in an aeroplane is approximately 688.7 N strong.
What is an illustration of a gravitational pull?The following are some instances of the power of gravity: the energy holding the gases inside the sun. the power behind a ball's descent after being thrown into the air. the force that makes an automobile coast downhill even when the gas is not depressed.
The following equation describes the gravitational attraction between the earth and a mass m object at a distance r from the earth's centre:
F = G * (M * m) / r^2
where G is the gravitational constant, M is the mass of the earth, and r is the distance between the center of the earth and the object.
Substituting the given values, we get:
F = G * (M * m) / r^2
= 6.67 × 10^-11 N·m^2/kg^2 * (5.98 × 10^24 kg * 70 kg) / (4950 m + 6.37 × 10^6 m)^2
≈ 688.7 N
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How far will a 50 N force stretch the same spring?
The force required to stretch the spring up to 0.5 m is 20 N. Then, the spring constant of the spring is 40 N/m. Then, a force of 50 N will stretch the same spring up to 1.2 m.
What is spring constant ?The force required to stretch an elastic material is directly proportional to the displacement x of the material.
hence, F = -kx
Where, the proportionality constant k is called spring constant.
Given that, the force required to stretch the spring up to 0.5 m is 20N.
then, spring constant = force/displacement
k = 20 N/0.5 m
= 40 N/m.
Then, the displacement made by a force of 50 N applied on the same spring is:
x = F/k
= 50 N/40 N/m
= 1.2 m.
Therefore, the force of 50 N will stretch the spring up to 1.2 m.
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Your question is incomplete. But your complete question probably was:
A 20 N force stretches a spring to 0.5 m. How far will a 50 N force stretch the same spring?
A 10kg bowling ball is moving at 10 m/s when it strikes a 3.0kg bowling pin at rest after the collision tge pin moves foward at 12m/s what is the speed of the bowling ball aftdd the collision
The speed of the bowling ball after the collision is 4 m/s.
What is momentum?The momentum is defined as the product of the mass and the velocity of the body.
We can use the law of conservation of momentum to solve this problem, which states that the total momentum of a system remains constant in the absence of external forces. The initial momentum of the system (bowling ball + bowling pin) is:
pi= m₁v₁ + m₂ v₂
= 10 kg x 10 m/s + 3 kg x 0 m/s
= 100 kg m/s
where m₁ is the mass of the bowling ball, v₁l is its velocity before the collision, m₂ is the mass of the bowling pin, and v'₂ is its velocity before the collision (which is zero since it's at rest).
After the collision, the momentum of the system is:
pf = m₁v'₁ + m₂ v'₂
Where v'₁ is the velocity of the bowling ball after the collision, and v'₂ is the velocity of the bowling pin after the collision.
Since momentum is conserved, we have:
pi= pf
Substituting the values we know, we get:
100 kg m/s = 10 kg x v'₁ + 3 kg x 12 m/s
Solving for v'₁, we get:
v'₁ = (100 kg m/s - 3 kg * 12 m/s) / 10 kg
v'₁ = 4 m/s
Therefore, the speed of the bowling ball after the collision is 4 m/s.
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An ideal gas undergoes and isothermal process. Which of the following statements are true? (i) No heat us added to or removed from the gas. (ii) The internal energy of the gas does not change. (iii) The average kinetic energy of the molecules does not change.
An ideal gas undergoes an isothermal process. The correct answer to this question is a statement (ii) The internal energy of the gas does not change and statement (iii) .
The average kinetic energy of the molecules does not change. An isothermal process is a thermodynamic process in which the temperature of a system remains constant. This means that the internal energy of the system, which is related to the average kinetic energy of the molecules, also remains constant. Therefore, statements (ii) and (iii) are true. However, statement (i) is not true. In an isothermal process, heat can be added to or removed from the gas in order to keep the temperature constant. For example, if the gas is expanding, heat will need to be added to the system in order to maintain a constant temperature. Conversely, if the gas is being compressed, heat will need to be removed from the system in order to maintain a constant temperature.
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caroline, a piano tuner, suspects that a piano's f4 key is out of tune. normally, she would play the key along with her f4 tuning fork and tune the piano to match, but her f4 tuning fork is missing. instead, she plays the errant key along with her e4 tuning fork (which has a frequency of 329.6 hz), displays the resulting waveform on a handheld oscilloscope, and measures a beat frequency of 13.5 hz. then, she plays the errant key along with her g4 tuning fork (which has a frequency of 392.0 hz) and measures a beat frequency of 48.9 hz.What frequency is being played by the out-of-tune key? A. 313.3 Hz B. 345.9 Hz C. 3.3 Hz D. 375.7 Hz E. 438.1 Hz The F4 key is supposed to produce a frequency of 349.2, is the frequency of the key lower than it should be (flat) or higher than t should be (sharp)? A. flat B. sharp
The F4 key is supposed to produce a frequency of 349.2 Hz. Since the estimated frequency of the out-of-tune F4 key is lower than the expected frequency, this indicates that the key is flat.
What is Frequency?
Frequency refers to the number of cycles or repetitions of a periodic wave that occur in a given unit of time. It is usually measured in Hertz (Hz), which represents the number of cycles per second.
For example, in sound waves, frequency refers to the number of pressure fluctuations per second that are perceived by the human ear as a particular pitch or tone. A high-pitched sound, such as a whistle, has a high frequency, while a low-pitched sound, such as a bass guitar, has a low frequency.
Therefore, the frequency being played by the out-of-tune F4 key is approximately 329.6 Hz.
According to the given information:To solve for the frequency of the out-of-tune F4 key, we can use the beat frequency formula:
beat frequency = |frequency of tuning fork - frequency of out-of-tune note|
For the first trial with the E4 tuning fork, we can write:
13.5 Hz = |329.6 Hz - frequency of out-of-tune note|
Solving for the frequency of the out-of-tune note, we find:
frequency of out-of-tune note = 329.6 Hz - 13.5 Hz = 316.1 Hz
For the second trial with the G4 tuning fork, we can write:
48.9 Hz = |392.0 Hz - frequency of out-of-tune note|
Solving for the frequency of the out-of-tune note, we find:
frequency of out-of-tune note = 392.0 Hz - 48.9 Hz = 343.1 Hz
Since we have two estimates of the frequency of the out-of-tune note, we can take their average to get a more precise estimate:
(frequency of out-of-tune note) avg = (316.1 Hz + 343.1 Hz) / 2 = 329.6 Hz
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write a live script yourlastname a3 hw.mlx to calculate parameters of trajectory of a projectile launched from a transport airplane. the launch altitude is 9 km above sea level. the projectile reached a maximum altitude of 40 km. it then descended to sea level and crashed into the water. specifically, calculate and print the following parameters:
The maximum altitude is 40km . The range of projectile is 3398.28 m and the displacement is 2575.12 m.
(a) Angle θ = 30°
altitude=40 km
Time = t = 20 s
Time of flight of a projectile is given by the expression,
t = (2usinθ/g)
20 = (2 X usin30 / 9.81)
u = 196.2 m/s
(b) Maximum altitude is given by H =
H = u²sin²θ / 2g
H = 196.2² X sin² 30 / 2 X 9.81
H = 490.6 m
(c) Range of projectile is given by = R =
R = u²sin2θ / g
R = 196.2² X sin 2 X 30 / 9.81
R = 3398.28 m
(d) Horizontal velocity = ucosθ = 196.2 x cos 30 = 169.91 m/s
Vertical velocity = usinθ = 196.2 x sin 30 = 98.1 m/s
We have equation of motion s = ut + 0.5 at²
Horizontal motion;
u = 9.81 m/s
a = 0
t = 15 s
Substituting,
= s = 169.91 x 15 + 0.5 x 0 x 15² = 2548.71 m
Vertical Motion;
= s = 98.1 x 15 + 0.5 x -9.81 x 15² = 367.88 m
Total displacement = √ ( 2548.71² + 367.88²) = 2575.12 m
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given the density of water is roughly 1mg/1l how could you verify whether you accurately pipette 950l of water into each tube
To verify whether you accurately pipette 950l of water into each tube, measure the actual weight of water and compare it with calculated weight.
To verify if you accurately pipetted 950 mL of water into each tube, you can weigh each tube before and after adding the water. Since you know the density of water, you can calculate the expected weight of the water in each tube, which should be equal to 950 g or 0.95 kg.
By subtracting the weight of an empty tube from the weight of a tube filled with water, you can determine the actual weight of the water added to the tube. If the actual weight is close to 0.95 kg, then the pipetting was accurate.
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