a) Her feet are in the air for 0.73+0.41 = 1.14 seconds
b) Her highest height above the board is 0.82 m
c) Her velocity when her feet hit the water is 7.16 m/s
Given,t = Time taken
u = Initial velocity = 4 m/s
v = Final velocity
s = Displacement
a = Acceleration due to gravity = 9.81 m/s²
a) Her feet are in the air for 0.73+0.41 = 1.14 seconds
s = ut + [tex]\frac{1}{2}[/tex]at²
2.62 = 0t + [tex]\frac{1}{2}[/tex] ₓ 9.8 ₓ [tex]t^{2}[/tex]
t = 0.73 s
b) Her highest height above the board is 0.82 m
The total height she would fall is 0.82+1.8 = 2.62 m
v = u + at
0 = 4 ₋ 9.8 ₓ t
t = 0.41 s
s = ut +[tex]\frac{1}{2}[/tex] at²
s = 4 ₓ 0.41 ₊ [tex]\frac{1}{2}[/tex] ₓ ₋9.8 ₓ 0.41 [tex]t^{2}[/tex]
c) Her velocity when her feet hit the water is 7.16 m/s
[tex]v = u + at \\v = 0 + 9.8[/tex] ₓ [tex]0.73[/tex]
v = 7.16 m/s
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two premises and a conclusion
The two premises and a conclusion are:
Premise 1: All birds can fly.
Premise 2: Eagles are birds.
Conclusion: Eagles can fly.
Premise 1: All living things need oxygen to survive.
Premise 2: Fish are living things.
Conclusion: Fish need oxygen to survive.
Premise 1: All fruits are high in vitamins.
Premise 2: Apples are fruits.
Conclusion: Apples are high in vitamins.
What are the premise about?These are examples of a logical argument that uses two premises, which are statements or propositions, as the basis for drawing a conclusion.
Therefore, In each example, the conclusion is a logical deduction based on the information provided in the premises. The first one is an example of an argument that uses the generalization and identification, the second one is an example of argument that uses the classification, and the third one is an example of argument that uses the definition.
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See full question below
give an example of two premises and a conclusion
A fast-food hamburger (with cheese and bacon) contains 1000 Calories.
Part A
What is the burger's energy in joules? Please convert answer to kj in two significant figures.
Part B
If all this energy is used to lift a 20 {\rm kg} mass, how high can it be lifted?
Please express your answer in two significant figures in km
So, we compiled a list of every fast-food burger with more than 1,000 calories. Consider this: the majority of individuals eat 2,000 calories on average each day.
It is therefore quite simple to exceed that calorie restriction if one component of one meal has more calories than a day's worth. Because of this, we've compiled a list of the worst fast-food burgers with surprisingly high calorie counts, from the worst to the worst offenders. The lack of McDonald's burgers on this list may actually come as a surprise to you. Unexpectedly, every burger at Mickey D's has fewer than 1,000 calories. The Double Quarter-Pounder with Cheese, which has 740 calories, is the main offender.
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its due rn pls and thank you
The answers include the following:
Earth is currently in a interglacial period - False.Atmospheric composition has remained constant throughout earth's history - FalseClimate has changed naturally over Earth's history - TrueThe increase in carbon dioxide since the year 1860 is similar to past increases - False.What is Climate?
This is referred to as the average weather condition in a given area over a longer period of time and it is dependent on different factors.
Climate has changed naturally over Earth's history as a result of burning of the fossil fuels like coal, oil and gas which is therefore the reason why true was chosen as the correct choice.
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10. A 6.0 kg block rests on top of a 7.0 kg block, which rests on a horizontal table. a. What is the force (magnitude and direction) exerted by the 7.0 kg block on the 6.0 kg block? b. What is the force (magnitude and direction) exerted by the 6.0 kg block on the 7.0 kg block?
Answer:
Below
Explanation:
The 7 kg block is pushing UP on the 6kg block to keep it from falling
force = ma = 6 kg * 9.81 m/s = 58.9 N
The 6 kg block is pushing DOWN on the 7 kg block with an equal but opposite force 58.9 N
estimate the length of the unit cell edge, a, from the atomic radius of aluminum (1.43 å).
For the FCC lattice, the relationship between edge length (a) and atom radius (r) is ( 2a) = 4r.
F + V = E + 2, where F is the number of faces, V is the number of vertices, and E is the number of edges, is how Euler's formula is expressed. According to Euler's formula, the number of faces plus the number of vertices minus the number of vertices equals two for many solid shapes. Length: 0.20 to 14.20 meters, trimmed per request of customs. Wall Thickness Requirement: 0.4 mm. Circumscribed Circle Diameter 300 mm, maximum dimensions. Workability: Simple to machine, cut, and weld.
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A two-slit experiment with red light produces a set of bright fringes. (a) Will the spacing between the fringes increase, decrease, or stay the same if the color of the light is changed to blue? (b) Choose the best explanation from among the following:
I. The spacing between the fringes will increase because blue light has a greater frequency than red light.
II. The fringe spacing decreases because blue light has a shorter wavelength than red light.
III. Only the wave property of light is important in producing the fringes, not the color of the light. Therefore the spacing stays the same
a) The spacing between the fringes will decrease if the color of the light is changed to blue.
b) II. The fringe spacing decreases because blue light has a shorter wavelength than red light.
The two-slit experiment is a fundamental experiment in wave optics that demonstrates the wave-like behavior of light. When a beam of light is shone through two small slits, it produces a diffraction pattern on a screen behind the slits. This pattern consists of a series of bright and dark fringes, which are caused by the interference of the light waves passing through the two slits.
Answer to (a) is that, if the color of the light is changed to blue, the spacing between the fringes will decrease. This is because the spacing between the fringes is inversely proportional to the wavelength of the light, and blue light has a shorter wavelength than red light.
As for the reason behind it, the best explanation is (b) II. The fringe spacing decreases because blue light has a shorter wavelength than red light. The wave property of light is important in producing the fringes, and the color of the light does play a role in the spacing of fringes, which is why the spacing decreases when the color of the light is changed to blue.
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11.The coefficients of static and kinetic friction for wood on wood are .5 and .3 respectively.
If a 100 N wooden box is pushed across a horizontal wooden floor with just enough force
to overcome the force of static friction, its acceleration is
a) .2 m/s²
b) .5 m/s²
c) 2 m/s²
d) 5 m/s²
Answer: a).5 m/s2
Explanation:
Which statement describes an unanticipated impact of a technological advance?
• A. Artificial neural networks have been developed to allow doctors to diagnose patients more quickly and accurately.
• B. The nonnative plant kudzu was brought to the United States in order to curb erosion, but it destroys native plants.
• C. Continued research and development has produced white LED lights that have gradually replaced traditional fluorescent and incandescent bulbs.
• D. The development of antibiotics allowed people to be treated for bacterial infections, but their overuse has led to strains of bacteria that cannot be killed by available antibiotics.
The statement that describes an unanticipated impact of a technological is that the development of antibiotics allowed people to be treated for bacterial infections, but their overuse has led to strains of bacteria that cannot be killed by available antibiotics.
What are antibiotics?An antibiotic is a type of antimicrobial substance active against bacteria which is the most important type of antibacterial agent for fighting bacterial infections, and antibiotic medications are widely used in the treatment and prevention of such infections.
Antibiotics are not effective against viral infections and this includes the common cold, flu, most coughs and sore throats.
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A valid scientific hypothesis
A. is proven wrong
B. is proven right
C. can be proven right or wrong right
D. makes common sense
E. is not intuitive
C. can be proven right or wrong
A scientific hypothesis is a proposed explanation for an observation or phenomenon. A valid scientific hypothesis must be testable and falsifiable, meaning that it can be proven right or wrong through the collection and analysis of data. A scientific hypothesis that cannot be tested or disproven is not considered a valid scientific hypothesis. Additionally, a scientific hypothesis should not be based on common sense or intuition alone, as these can be misleading and not always accurate. Rather, it should be supported by evidence and logical reasoning.
Let me know if this helps! :)
A small cube of mass m slides back and forth in a frictionless hemispherical bowl of radius R. The position of the cube is defined by the angle it is moved around the edge of the bowl starting from the bottom of the bowl. Suppose the cube is raised to an angle θ and released. What is the cube’s speed at the bottom of the bowl? Your solution must include labelled diagrams (initial and final) of the problem.
Your solution must address the following questions:
i. What is your definition for the system for this problem?
ii. Is any external work done on the system?
iii. What is the main principle or concept used to solve this problem?
iv. Discuss how this problem could be solved by using Newton’s laws, what problems are encountered?
The cube slides back and forth in a frictionless hemispherical bowl of radius R. When the cube is raised to an angle θ and released, the conservation of energy is applied to calculate the cube’s speed at the bottom of the bowl.
i. The system for this problem is the small cube of mass m and the hemispherical bowl of radius R.
ii. No external work is done on the system.
iii. The main principle or concept used to solve this problem is the conservation of energy.
iv. This problem can be solved by using Newton’s laws. The cube is initially at rest and is raised to an angle θ. Since the bowl is frictionless, the force of gravity is the only force acting on the cube, so the net force on the cube is zero. This means that the cube’s momentum is constant. Since the cube is at rest initially, its initial momentum is zero. As it is raised to an angle θ, it gains gravitational potential energy. At the bottom of the bowl, the cube’s gravitational potential energy is converted to kinetic energy, so the cube’s speed is equal to its kinetic energy divided by its mass (m). This means that the cube’s speed at the bottom of the bowl is:
Speed = (m * g * h) / m
where h is the height of the bowl.
The cube slides back and forth in a frictionless hemispherical bowl of radius R. When the cube is raised to an angle θ and released, the conservation of energy is applied to calculate the cube’s speed at the bottom of the bowl. The cube’s speed is found by dividing the cube’s gravitational potential energy by its mass.
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A combination of series and parallel connections of capacitors is depicted in the figure. Randomized Variables C1=18 HF C2= 6.09 UF C3= 1.85 UF
The combined effect of the capacitor network can be determined by combining the individual capacitances of the capacitors in either a series or parallel configuration.
What is capacitor?A capacitor is an electrical device used to store energy in the form of an electric field. It consists of two metal plates separated by an insulating material (dielectric) and is commonly used in both AC and DC circuits. The ability of a capacitor to store and release energy quickly can be used to regulate the current in a circuit and to filter out unwanted signals. Capacitors can also be used to smooth out voltage spikes and to provide a reserve power source.
When capacitors are combined in series, the total capacitance of the circuit is the reciprocal of the sum of the reciprocals of each capacitor:
1/Ct = 1/C1 + 1/C2 + 1/C3
In this example, the total capacitance of the circuit is 0.41 UF. When capacitors are combined in parallel, the total capacitance of the circuit is the sum of the individual capacitances:
Ct = C1 + C2 + C3
In this example, the total capacitance of the circuit is 25.94 UF. This combination of capacitors can be used in various circuits to reduce the total capacitance of the network. For example, in low-pass filter circuits, the total capacitance of the network is reduced by using a combination of series and parallel connections of capacitors. This reduces the time constant of the circuit, which can be used to adjust the cut-off frequency of the filter. Additionally, this combination of capacitors can be used in power supply circuits to reduce the ripple voltage, which is the alternating current component of the voltage output.
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If planet A and B are both circling around star A and A completes an orbit in 2 days
while B needs 10 days, then what is the radius of B's orbit if that of A is 3.0 x 108 m (in
meters)?
The radius of B planet is 8.7 x 10^8m calculated based on the Kepler's third law.
Why is the third law of Kepler significant?The square of a planet's period of revolution around the sun in an elliptical orbit is precisely proportional to the cube of its semi-major axis, according to Kepler's law of periods. A planet's orbits around the sun are accurately described by Kepler's third law in terms of their period and distance.
Kepler's third law:
(TB/TA)^2 = (RB/RA)^3
TB and TA are time taken for B and A respectively.
RB and RA are radius of B and A respectively.
(10/2)^2= (RB^3/27 x 10^24)
RB => 8.7 x 10^8 m
What is the prerequisite for Kepler's third law?In fact, the total mass of the two bodies involved affects the constant in Kepler's Third Law. Kepler himself dealt only with the Sun-plus-planet 2-body system while researching the motion of the planets around the Sun.
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while the penumbra of a sunspot can "grow" and become bigger. What do you think this means? What is the significance of it for us on Earth
The significance is that the area around the sunspot is becoming darker and larger.
What are sunspot and why do they occur?
Sunspots are dark, cooler regions on the surface of the sun that appear dark in contrast to the surrounding brighter regions. They are caused by intense magnetic activity that impairs the flow of heat and energy from the sun's interior. Sunspots are most commonly found near the poles of the sun, and can vary in size from just a few hundred to many thousands of kilometers in diameter. Sunspots can last for days, weeks, or even months depending on their size and activity.
This is significant for us on Earth because sunspots are associated with increased solar activity, which can lead to changes in Earth’s magnetic fields. This can cause geomagnetic storms and additional radiation reaching Earth’s surface, which can disrupt power grids, radio transmissions, and other electronic systems.
Therefore, the sunspot is becoming darker and larger.
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A 9.00 kg bomb mass is sitting stationary. The bomb explodes and M1 (3kg) moving to the left with a velocity of
140 ms (v₁). The remaining portion flys to the right. Determine the v2 (velocity) it flys off with
A 9 kg explosive detonates into two fragments, each weighing 3 kg and 6 kg. The kinetic energy of mass 6 kg is 1.92 J, and the velocity of mass 3 kg is 1.6 m/s.
What is meant by velocity?The rate at which an object's position changes as perceived from a particular point of view and as measured by a certain unit of time is determined by its velocity, which can be expressed as, for instance, 60 km/h northbound. Quickness of motion or activity is known as velocity. Speed is a shorter term and a synonym for celerity. The term "velocity" in physics especially refers to the measurement of an object's rate and direction of positional change.The vector quantity velocity (v), denoted by the equation v = Δs/Δt, quantifies displacement (or change in position, s), over change in time (t).Therefore,
The total momentum of the bomb is unchanged before and after the explosion thanks to the conservation of linear momentum.
0 = 3 × 1.6 + 6v
v = 0.8 m/s
Kinetic energy of mass 6 kg is:
1/2 mv² = 1/2 × 6 × 0.8²
= 1.92 J
Hence, the correct option is c) 1.92J
The complete question is:
A bomb of mass 9kg explodes into 2 pieces of mass 3kg and 6kg. The velocity of mass 3kg is 1.6m/s, the kinetic energy of mass 6kg is :
A) 3.84J
B) 9.6J
C) 1.92J
D) 2.92J
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ketch a PV diagram and find the work done by the gas during the following stages.
(a) A gas is expanded from a volume of 1.0 L to 3.0 L at a constant pressure of 3.0 atm.
(b) The gas is then cooled at constant volume until the pressure falls to 2.0 atm.
(c) The gas is then compressed at a constant pressure of 2.0 atm from a volume of 3.0 L to 1.0 L. Note: Be careful of signs.
(d) The gas is heated until its pressure increases from 2.0 atm to 3.0 atm at a constant volume.
(e) Find the net work done during the complete cycle.
(a) The work done by the gas during this stage can be calculated using the equation: W = P * (Vf - Vi) = 3.0 atm * (3.0 L - 1.0 L) = 6.0 L-atm.
(b) The work done by the gas during this stage is zero, since the gas is cooling at constant volume.
(c) The work done by the gas during this stage can be calculated using the equation: W = P * (Vf - Vi) = 2.0 atm * (1.0 L - 3.0 L) = -4.0 L-atm. Note the negative sign indicates work is done on the gas.
(d) The work done by the gas during this stage can be calculated using the equation: W = P * (Vf - Vi) = 3.0 atm * (3.0 L - 3.0 L) = 0 L-atm.
(e) The net work done during the complete cycle can be found by adding up the work done during each stage: Wnet = 6.0 L-atm + 0 L-atm + (-4.0 L-atm) + 0 L-atm = 2.0 L-atm.
What is a constant pressure cycle?A constant pressure cycle is a thermodynamic process where the pressure remains constant while the volume and temperature of the gas change. In such a cycle, the work done by the gas is equal to the change in its volume multiplied by the constant pressure. The PV diagram of a constant pressure cycle is a horizontal line at the constant pressure value, because the pressure does not change. The most common example of a constant pressure cycle is the Otto cycle used in internal combustion engines.
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What is the component of A?
Express your answer to the nearest integer.
Ax=
Answer:
3
Explanation:
Are you looking just for the x-component of vector A? If so, the answer is:
3
Go from the tip of the vector A arrow straight down to the x axis
As researchers cool a substance close to absolute zero, what happens?
-The work needed to cool it further falls to zero.
-The work needed to cool it further decreases, becoming easier.
-The work needed to cool it further increases.
-Work is done on the environment by the substance.
Answer:
Nothing can be cooled to a temperature of exactly absolute zero. The temperature of an object is a measure of the average random motion energy (kinetic energy) of its atoms. Absolute zero is the temperature at which all of an object's atoms have been brought to a dead stop relative to each other.
Explanation:
When applied to cooling, the question becomes how much work must be done and how large must the cooling reservoir be in order to cool an object to absolute zero (0 Kelvin, -273.15°C, or -459.67°F)? The physicists showed that cooling a system to absolute zero requires either an infinite amount of work or an infinite reservoir.
1. To prepare the body for the vigorous workout. 2. To allow the body to settle down and unwind. What does a well-designed kettlebell workout consist of? 1. Preparation phase: Warm up 2. Main phase: Workout 3. Final phase: Cool down What does the main phase of a workout involve?
A person’s environment can include many settings, including home, work, school, neighborhoods, recreation areas, and social events. If your environment is one in which drugs or alcohol are available and widely accepted, it can have a strong effect on your potential for abuse and addiction. Environmental factors can strongly influence addiction.
What is the direction of the magnetic force that this solenoid exerts on the bar magnet?
O Upward
O Downard
O To the right away from the solenoid
O To the left, toward the solenoid.
Correct option is D, the direction of the magnetic force that this solenoid exerts on the bar magnet To the left, toward the solenoid.
We are aware that like poles repel one another and that opposing poles attract one another. Therefore, the bar magnet will be drawn to the solenoid. Therefore, the solenoid's left side must be receiving the force.
We are aware that like poles repel one another and that opposing poles attract one another. Therefore, the bar magnet will be drawn to the solenoid. Therefore, the solenoid's left side must be receiving the force.
What does magnetic force mean?One of the four fundamental forces of nature, the electromagnetic force, results in the magnetic force, which is brought about by the motion of charges. When two charge-containing objects move in the same direction, a magnetic attraction pulls them together. A compass, a motor, the magnets that hold items in refrigerators, railroad tracks, and modern roller coasters are examples of devices that use magnetic force. A magnetic field is created by all moving charges, and the charges that move across its areas,
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given the following frequency distribution, how many pieces of data were less than 28.5?
The 25 pieces of data were less than 28.5.
What is frequency ?
The quantity of waves that pass a fixed place in a unit of time is referred to as frequency in physics. It also indicates how many cycles or vibrations a body in periodic motion experiences in a given amount of time.
What is data ?
In physics, organising and analysing experimental data is done to provide evidence for a theory or hypothesis. It is an important step in the scientific method and requires students to demonstrate high levels of expertise in key scientific skills.
From given table,
Take sum of frequencies up to class 23.5-28.8,
F = 4 + 9 + 12 = 25.
The number of pieces of the data were less than 28.5 is : 25.
Therefore, 25 pieces of data were less than 28.5.
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Frank’s power output to climb a set of stairs in 6 seconds is 400 W. How much word dis he do
The work done in 6 seconds is 66.66J oules.
Power, Work, and TimeWork is defined as the energy transferred to or from an object by applying force along a displacement. In its most basic form, work equals the product of force strength and distance traveled for a constant force aligned with the direction of motion.
Given Data
Time = 6 seconds
Power output = 400W
We know that the expression for power is given as
Power = Work*Time
Substituting our given data in the expression for power have
400 = Work*6
Making work subject of formula we have
Work = 400/6
Work = 66.66 Joules
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In terms of L. find an expression for the distance xm for which the period is a minimum. Expression : Xm_______________________________
The expression for the distance xm for which the period is a minimum is given by xm = (2πL)/n, where n is an integer greater than or equal to 2.
What does Distance XM mean?
Distance xm refers to a distance measurement in meters. For example, if you see "Distance 500m," this means 500 meters.
Distance xm is also sometimes used to refer to a distance measurement in miles. For example, if you see "Distance 500m," this could mean 500 miles.
What do you mean by Integer and where is it used?
A whole number (not a fraction) that can be positive, negative, or zero is referred to as an integer. Integers include the numbers -5, 0, 1, 5, and 10. In many areas of mathematics, such as counting, measuring, and calculating, integers are used. They're also used in computer programming, where they're known as data types. Temperatures, dates, times, and money are examples of real-world values represented by integers.
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A lever is used to lift an object with a weight of 60 Newtons. The effort force is 15 meters from the fulcrum, while the load force
5 meters from the fulcrum. What is the mechanical advantage? (1 point)
0 3
O 75
O 12
04
According to the question, the effort force is 15 meters from the fulcrum, while the load force 5 meters from the fulcrum. The mechanical advantage is 4.
What is mechanical advantage?
Mechanical advantage is the ratio between the output force of a machine and the input force. It is used to compare the amount of work put in to the amount of work done. It is the measure of how much a machine multiplies the force applied to it or reduces the amount of force needed to do a certain task. Basically, it is the measure of how efficient a machine is. By using mechanical advantage, a machine can increase the output force or reduce the amount of force needed to do a certain task. This allows machines to be used to complete tasks that would be difficult or impossible to do using just human strength.
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A roller coaster car(m=80kg) on nitro is moving at a speed of 68 m/s as it starts going up to the top of the ride. How high is the ride’s highest point relative to this starting point?
According to the given statement 11.48 m high is the ride’s highest point relative to this starting point.
What is speed in physics and its unit?Speed is the rate of change of a distance with respect to time. Time-distance is one of its dimensions. The result is that the basic units of time and distance are added to produce the SI unit of speed. The Si system of speed is therefore the m per second (m/s).
The following data were obtained from the question:
The roller coaster weighs 1200 Kg in mass (m).
Initial velocity (u) = 15 m/s.
Final speed (v) equals 0 m/s (at highest point)
Acceleration due to gravity (g) = 9.8 m/s²
Highest point (h) =?
The roller coaster's highest point can be found as shown in the illustration below:
h = u²/2g
h = 15² / 2 × 9.8
h = 225/19.6
h = 11.48 m
Therefore, the highest point reached by the roller-coaster is 11.48 m.
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a 40.0 kg block of lead is heated from -25°c to 200.°c. how much heat is absorbed by the lead block? the specific heat value of lead is 130 j/kgoc.
To melt 2 kg of ice 835.48 KJ of heat is required.
Total heat = Heat required to convert 2 kg of ice to 2 kg of water at 0 °C + Heat required to convert 2 kg of water at 0 °C to 2 kg of water at 20 °C.
Heat=mhfg+mCpΔT
Here, m ( mass of ice) = 2 kg
hfg (latent heat of fusion of ice) = 334 KJ
Cp of water (specific heat) = 4.187 KJ/Kg-K
ΔT(Temperature difference) = 20 °C
Therefore, Heat required = 2 x 334 + 2 x 4.187 x (20 - 0 )
Heat reqd= 835.48 KJ
Therefore, to melt 2 kg of ice 835.48 KJ of heat is required
What is heat?
Heat is defined as a form of energy crossing the boundary of a thermodynamic system due to a temperature difference across that boundary.A thermodynamic system does not contain heat. However, the term is also often used to refer to the thermal energy contained in a system as part of its internal energy, which is reflected in the temperature of the system.To know more about heat, click the link given below:
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A velocity selector is to be constructed using a magnetic field in the positive y direction. If positively charged particles move through the selector in the positive z direction, what must be the direction of the electric field? Repeat for the case of negatively charged particles.
Answer:
you are crazy
Explanation:
By measurement you determine that sound waves are spreading out equally in all directions from a point source and that the intensity is 0.026W/m^2 at a distance of 4.3 m from the source. (a) What is the intensity at a distance of 3.1 m from the source? (b) How much sound energy does the source emit in one hour if its power output remains constant?
a) The intensity at a distance of 3.1 m from the source is 0.00369W/m².
b) 92.8 Ws energy does the source emit in one hour if its power output remains constant.
What is distance ?
Distance is the measure of the space between two points. It can be expressed in a variety of ways, such as kilometers, miles, or even light-years. Distance is an important concept in many areas of mathematics, science, and technology, as it is used to measure the size and/or separation of objects.
a) The intensity of the sound waves at a distance of 3.1 m from the source can be determined using the inverse square law: I = I₀/d²
where I₀ is the initial intensity and d is the distance from the source.
Therefore, the intensity of the sound waves at a distance of 3.1 m from the source is: I = 0.026W/m² / (3.1 m)² = 0.00369W/m²
b) The sound energy emitted by the source in one hour can be calculated using the following equation: E = P × t
where P is the power output of the source and t is the duration of time.
Therefore, the sound energy emitted by the source in one hour is:
E = 0.026 W/m² × 3600 s = 92.8 Ws
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which word best describes the motion of a liquid atom
Answer:
Classical Brownian motion
Explanation:
In liquids, particles are quite close together and move with random motion throughout the container. Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles.
The term “classical Brownian motion” describes the random movement of microscopic particles suspended in a liquid or gas.
The three wave pulses in (Figure 1) travel along the same stretched string. Part A Rank in order, from largest to smallest, their wave speeds va, Ub, and U. To rank items as equivalent, overlap them.
The wave velocity depends on the tension in the string and the mass per unit length of the string.
These two variables he remains the same for all three strings, so the speed is equal. Va = Vb = Vc
What is the wave speed?Wave speed commonly refers to velocity, but velocity actually means both speed and direction. A wave's velocity is equal to its wavelength times its frequency (the number of oscillations per second) and is independent of its intensity.
Why is wave speed important?Wave velocity is an important parameter that can accurately describe the mechanical properties of rocks.
What does wave speed depend on?The speed of a wave is independent of time and the source of the wave, but the speed of a wave depends on the wavelength of the wave propagating in a particular medium. Wave speed depends on the medium used.
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A 32.2 kg child slides down a long slide in a playground. She starts from rest at a height h1 of 24.3 m. When she is partway down the slide, at a height h2 of 7.70 m, she is moving at a speed of 1.60 m/s. Calculate the mechanical energy lost due to friction (as heat, etc...) between h1 and h2.
The mechanical energy lost due to friction between h1 and h2 is 5,323.2 J
What is mechanical energy?Mechanical energy is the sum of the potential energy and kinetic energy possessed by an object due to its motion and position. It is energy that is associated with the motion and position of an object. It is often associated with machines and other moving objects, as their components have energy due to the work done to move them.
The mechanical energy of the child can be calculated using the following equation:
Mechanical Energy = mgh
where m is the mass of the child, g is the acceleration due to gravity, and h is the height.
The initial mechanical energy of the child at h1 is:
E1 = 32.2 kg * 9.81 m/s2 * 24.3 m = 7,722.3 J
The final mechanical energy of the child at h2 is:
E2 = 32.2 kg * 9.81 m/s2 * 7.7 m = 2,399.1 J
Therefore, the mechanical energy lost due to friction between h1 and h2 is: E Lost = 7,722.3 J - 2,399.1 J = 5,323.2 J
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what would be the momentum of an object if it were moving at the speed of light?
There would be endless momentum. The object's momentum would be unlimited at the speed of light, therefore getting it there would take an infinite impulse.
An infinite impulse would require either an infinite force or an endless time (our time, not the time of the object), as impulse is defined as force times time.
The mass of an object would become infinite if it ever managed to travel at the speed of light. The energy needed to move the object would then have to be limitless, which is impossible. The principles of physics state that as we get closer to traveling at light speed, it takes more and more energy to move an object. You would require a limitless supply of energy, which is not conceivable, in order to travel at the speed of light.
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