If there were no friction and air resistance, an ideal coaster could go down and up hills at the same height eternally. If you want to round to one or two decimal places, look at the digit immediately decimal point.
Roller coasters can reach what heights?Almost always, the start of a roller coaster is a vertical plummet. The automobiles are propelled by a motor to a top of a steep hill, after which gravity takes over completely. Typical vertical fall could be anywhere between 50 and 80 metres high.
How are answers rounded to decimal places?When round a decimal value, there are a few guidelines to remember. To put it another way, it round previous digit down if the final digit is much less than 5. However, you just round the previous figure up if it is 5 or above. Thus, it round number up if 5, 6, 7, 8, or 9 come after the number we are about to round.
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A shell is shot with an initial velocity, v0 of 20m/s,at an angle of θ0= 60 with the horizontal. At thetop of the trajectory, the shell explodes into two fragments ofequal mass. One fragment, whose speed immediately after theexolosion is zero, falls vertically. How far from the gun does theother fragment land, assuming that the terrain is level and thatair drag is negligible?
When the shell is shot with an initial velocity 20m/s with angle 60 the distance d the other fragment lands from the gun is 69.3 m.
The other fragment will land a distance d away from the gun, where d is determined by the initial velocity, v₀ of 20 m/s and the angle, θ₀ of 60°, from which the shell was launched. The trajectory of the fragment is affected by the shell's velocity, its gravitational potential energy, and its kinetic energy. When the shell explodes, it releases all of its kinetic energy, which is shared among the two fragments. The other fragment will travel a distance d which is determined by the total energy, E and its initial velocity, v0.
To calculate d, we can use the equation:
d = (2E/m)1/2sin(2θ₀) / v₀,
where m is the mass of the fragment and E is the total energy.
Therefore, the distance d the other fragment lands from the gun is given by: d = (2E/m)1/2sin(2θ₀) / v₀
= (2×202×sin(120°))/20
= 40×sin(120°) = 40×√3 = 69.3 m.
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3. a vertical spring stretches 3.9 cm when a 10-g object is hung from it. the object is replaced with a block of mass 25 g that oscillates up and down in simple har- monic motion. calculate the period of motion.
The period of motion of a vertical spring that stretches 3.9 cm when a 10-g object is hung from it is 0.883 s.
Period of motion = 2π√(m/k) Where,m = mass of the object k = spring constant. Given data:Spring stretches = 3.9 cm. Mass of the object = 10 g = 0.01 kg. New mass = 25 g = 0.025 kg. Formula used:Period of motion = 2π√(m/k). Calculation:First we need to calculate the spring constant using the formula below:F = -kx Where,F = force (in N)x = extension (in m)k = spring constant.We have the value of x, and we can calculate the force.F = ma Where,a = acceleration (in m/s²)m = mass (in kg)
We can assume that acceleration is the same as gravity (9.8 m/s²) since the object is hung vertically.F = (0.01 kg) × (9.8 m/s²) = 0.098 N.Since the spring stretches by 3.9 cm = 0.039 m, we can calculate the spring constant:k = F/x = 0.098 N / 0.039 m = 2.51 N/m.Now we can calculate the period of motion using the formula below:Period of motion = 2π√(m/k)Period of motion = 2π√(0.025 kg / 2.51 N/m).Period of motion = 0.883 s. Therefore, the period of motion is 0.883 s.
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Part GNow, using the results of Part F, find the total kinetic energy K of the system. Remember that both particles rotate about the y axis.
Express your answer in terms of m, ω, and r.
Answer:
K = (11*m*(ω*r)^2)/2
Explanation:
Not surprisingly, the formulas K = (1/2)*I*ω^2 and K = (1/2)*m*v^2 give the same result. They should, of course, since the rotational kinetic energy of a system of particles is simply the sum of the kinetic energies of the individual particles making up the system.
what is large solar eruptions that occur near sunspots
Large solar eruptions near sunspots are known as coronal mass ejections (CMEs).
what are CMEs?Coronal mass ejections (CMEs) are huge explosions of plasma and magnetic fields from the sun's corona, the outermost layer of the sun's atmosphere. Sunspots are areas on the sun's surface where the magnetic field is much stronger than surrounding regions, which can lead to the buildup of energy that can trigger a CME.
CMEs can release vast amounts of energy and can cause solar flares, geomagnetic storms, and other space weather phenomena that can affect our planet.
They can also pose a danger to astronauts and satellites in space. Scientists study CMEs to better understand the sun's behavior and how it affects Earth and the rest of the solar system.
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A conductor is in the shape of a small diameter cylindrical wire on the left and a large diameter cylindrical wire on the right as shown. An emf is applied between points A and B of the wire with a battery.
a. Which side has the larger current magnitude and why?
b. Which side has the larger potential difference magnitude, and why?
c. Which side has the larger drift velocity magnitude, and why?
d. Answers may include both sides are the same.
In case, when two cylindrical wires of different diameters are connected in series, an emf (electromotive force) is applied across the ends.
a. The side with the smaller diameter cylindrical wire on the left will have a larger current magnitude. This is because the current density, which is defined as the current per unit cross-sectional area of the wire, is inversely proportional to the cross-sectional area of the wire. Since the left side has a smaller cross-sectional area, it will have a larger current density and therefore a larger current magnitude.
b. The potential difference magnitude is the same on both sides. This is because the potential difference between two points is determined by the emf of the battery and is independent of the wire's properties. Therefore, the potential difference between points A and B is the same on both sides of the wire.
c. The side with the smaller diameter cylindrical wire on the left will have a larger drift velocity magnitude. This is because the drift velocity of electrons in a wire is proportional to the current density, which as stated above, is inversely proportional to the cross-sectional area of the wire. Since the left side has a smaller cross-sectional area, it will have a larger current density and therefore a larger drift velocity magnitude.
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A 1500 kg car is moving to the right with a speed of 20.0 m/s when it collides with a wall and reboubds at a speed of 5.00 m/s.
If the collision lasts for 250 ms, then the magnitude of the average force acring on the car is _____ kN (the answer is 150 but I'm not sure how)
pls help!!
Answer:
See below.
Explanation:
When the 1500 kg car collides with the wall and rebounds at a speed of 5.00 m/s, we can calculate the change in the car's velocity using the following formula:
Δv = v2 - v1
Where Δv is the change in velocity, v2 is the final velocity, and v1 is the initial velocity. Substituting the given values, we get:
Δv = 5.00 m/s - 20.0 m/s
Δv = -15.0 m/s
The negative sign indicates that the direction of the car's velocity has reversed, or that the car is now moving to the left. To calculate the magnitude of the change in velocity, we take the absolute value:
|Δv| = |-15.0 m/s|
|Δv| = 15.0 m/s
Therefore, the magnitude of the change in velocity is 15.0 m/s.
Now,
To find the magnitude of the average force acting on the car during the collision, we can use the impulse-momentum theorem, which states that:
Impulse = change in momentum
Average force = Impulse / time
The change in momentum of the car is given by:
Δp = mΔv
where Δv is the change in velocity calculated in the previous answer and m is the mass of the car.
Δp = 1500 kg × (-15.0 m/s)
Δp = -22500 kg·m/s
The impulse acting on the car during the collision is equal to the change in momentum:
Impulse = Δp = -22500 kg·m/s
To find the magnitude of the average force acting on the car during the 250 ms collision, we divide the impulse by the duration of the collision:
Average force = Impulse / time
Average force = -22500 kg·m/s / 0.250 s
Average force ≈ -90,000 N
The negative sign indicates that the force is in the opposite direction of the car's motion, or to the left. Therefore, the magnitude of the average force acting on the car during the collision is approximately 90,000 N.
if two tiny identical spheres attract each other with a force of 2.0 nn when they are 29 cm apart, what is the mass of each sphere? express your answer with the appropriate units.
The mass of each sphere with the appropriate units are the 0.6 kg by the two tiny identical spheres attract each other with a force of 2.0 nn when they are 29 cm apart.
Let's consider the following scenario: Two tiny identical spheres attract each other with a force of 2.0 nn when they are 29 cm apart. The mass of each sphere is what we need to calculate. The formula for calculating the mass of each sphere. F = Gm1m2 / r²Where:F = Force. G = Gravitational constantm1 and m2 = the masses of the object sr = the distance between the objects.
Substitute the given values: Force (F) = 2.0 nn. Distance (r) = 29 cm = 0.29 m. Gravitational constant (G) = 6.67 × 10-11 N.m²/kg²Find the mass of each sphere.m1 = m2 = m. Multiply the entire equation by ][tex]r² / G:m² = F × r² / G = (2.0 nn) × (0.29 m)² / 6.67 × 10-11 N.m²/kg²= 0.6 kg.[/tex]
Therefore, each sphere's mass is 0.6 kg.
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A small mass rests on a horizontal platform which vibrates vertically in simple harmonicmotion with period 0.50 s.(a) Find the maximum amplitude of the motion which will allow the mass to stay in contactwith the platform throughout the motion.The maximum acceleration that will allow the object to remain in contact with theplatform at all times is when amax = g = 9:81 m/s.But amax = !222A = (2¼=T )A ) 9:81 = (2¼=0:5)2A = 158A ) A = 0:062 m
The maximum amplitude of the motion which will allow the mass to stay in contact with the platform is 0.062 m.
This can be calculated by using the equation amax = (2π/T)2A, where A is the maximum amplitude, and T is the period of the motion. In this case, T is 0.50 s, and g (the acceleration due to gravity) is 9.81 m/s2, so we can calculate A:
A = (2π/T)2g = (2π/0.50)2 × 9.81 = 158 × 9.81 = 1543.38
Therefore, A = 1543.38/158 = 9.81 m/s2 = 0.062 m.
Alternatively: given,T = 0.50 s,The acceleration due to gravity, g = 9.81 m/s²Maximum acceleration, amax = g = 9.81 m/s². The maximum acceleration that will allow the object to remain in contact with the platform at all times is when amax = !222A = (2π/T )A ) 9.81 ...(1)From the equation (1), we get 158 A = 9.81 (2π/0.50)A = (9.81 (2π/0.50))/158 = 0.062 m. Therefore, the maximum amplitude of the motion which will allow the mass to stay in contact with the platform throughout the motion is 0.062 m.
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Ignacio shares 2.1 liters of water equally into 7 containers. How many milliliters are in each container?(A) 0.3 milliliters(B) 300 milliliters(C) 2,100 milliliters(D) 14,700 milliliters
When Ignacio shares 2.1 liters of water equally into 7 containers, the milliliters in each container are 300 milliliters. Therefore, the correct option is B.
It is given that Ignacio shares 2.1 liters of water equally into 7 containers. To convert liters into milliliters, we multiply the given value by 1000. According to conversion unit, 1 liter = 1000 milliliters.
Therefore, 2.1 liters = 2.1 * 1000 = 2100 milliliters.
Now, to find milliliters in each container, we divide the total volume of water by the total number of containers. Therefore, the number of milliliters in each container is:2100 / 7 = 300 milliliters.
Hence, the correct answer is option (B) 300 milliliters.
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a truck collides with a car, and during the collision, the net force on each vehicle is essentially the force exerted by the other. suppose the mass of the car is 550 kg, the mass of the truck is 2200 kg, and the magnitude of the truck's acceleration is 10 m / s 2 10m/s 2 . find the magnitude of the car's acceleration.
Answer: The magnitude of the car's acceleration is 40m/s²
Explanation:
According to Newton's third law of motion, for every action, there is an equal and opposite reaction. Therefore, the force exerted by the car on the truck is similar to the force exerted by the truck on the car in magnitude and opposite direction.
To begin, we must calculate the force exerted by the truck on the car. The force exerted by the truck on the car is given as:
F = maF = (mass of car) × (acceleration of car)
Now, we need to calculate the acceleration of the car.
a = F/m a = [(mass of truck) × (acceleration of truck)] / (mass of car)
Substituting the given values, we get:
a = [(2200 kg) × (10 m/s²)] / (550 kg) = 40 m/s²
Therefore, the magnitude of the car's acceleration is 40 m/s².
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you have an rc circuit with a time constant of 5.35 s. if the total resistance in the circuit is 231.2 k , what is the capacitance of the circuit (in f)? don't type the units into the answer box.
The capacitance of the circuit (in f) is 2.31×10⁻⁵F for the rc circuit with a time constant of 5.35 s. if the total resistance in the circuit is 231.2 k.
What is the capacitance of the circuit?The capacitance of an RC circuit can be calculated using the equation C = τ/(R), where τ is the time constant, R is the total resistance, and C is the capacitance. For this RC circuit, the time constant is 5.35s and the total resistance is 231.2 k. Therefore, the capacitance is 5.35s/(231.2k) = 2.31×10⁻⁵F.
Time constant of the RC circuit, τ = 5.35s
Total resistance in the circuit, R = 231.2 kΩ = 231200 Ω
Capacitance of the circuit = ?
We know that, Time constant (τ) of a RC circuit = R × C.
where, R is the resistance in ohms, C is the capacitance in farads. Substitute the given values in the above equation:
τ = RC
5.35 s = R × C231200 Ω × C = 5.35 s
C = 5.35 s / 231200 Ω
C = 2.31 × 10⁻⁸ F.
Therefore, the capacitance of the circuit is 2.31 × 10⁻⁸ F.
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An object is_____ if its position changes relative to another object.
A. in motion
B. at reset
C. a frame of refence
D. magical
An object is "in motion" if its position changes relative to another object.
Motion is a fundamental concept in physics, which describes how objects move and change position over time. When we say that an object is in motion, we mean that it is changing its position with respect to some reference point or frame of reference.
A reference point is a fixed point in space that we use as a point of comparison to measure an object's position and motion. For example, when we say that a car is moving on a highway, we are using the highway as a frame of reference to measure the car's motion.
An item is considered to be "in motion" if its position in relation to another object changes.
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What ionic compound would bond in a 1 to 2 ratio?
An ionic compound that would bond in a 1:2 ratio would be one in which the cation has a charge of 2+ and the anion has a charge of 1-. This is because the total charge of the compound must be neutral.
An ionic compound is a type of chemical compound that is formed through the transfer of electrons between atoms. In an ionic compound, one or more positively charged ions (known as cations) are attracted to one or more negatively charged ions (known as anions) to form a stable structure. The cations and anions are held together by electrostatic forces known as ionic bonds.
Ionic compounds typically have high melting and boiling points, are usually crystalline solids at room temperature, and are often soluble in water. They can conduct electricity when dissolved in water or when melted, but not when in a solid state. Ionic compounds have a wide range of applications, including as building blocks for ceramics, in the production of batteries, and as components of various chemical processes. Examples of common ionic compounds include sodium chloride (table salt), calcium carbonate (chalk), and potassium iodide (used in medicine).
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Two negative electrical charges are constrained so that they are very close together just after the charges are released their electrical potential energy will , their kinetic energy will and they will travel each other
Their electrical potential energy will decrease, their kinetic energy will increase, and they will travel towards each other.
Electrical potential energy of chargesWhen two negative charges are released and constrained to remain close together, the charges will be repelled by each other due to their opposite electrical charges.
This repelling force causes the charges to move away from each other, increasing their kinetic energy and decreasing their electrical potential energy.
Since they are constrained to remain close together, they will travel towards each other until they come into contact. At that point, the electrical potential energy will reach its minimum, and the kinetic energy will reach its maximum.
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Predict how the horizontal component of the velocity will change with time after the projectile is fired.
A) It stays constant. B) It continuously decreases. C) It continuously increases. D) It first increases and then decreases. E) It first decreases and then increases.
The correct option is option A) It stays constant.The horizontal component of the velocity will remain constant with time after the projectile is fired.
Projectile motion is the movement of an object that has been thrown, launched, or shot into the air. The object is called a projectile, and its path is referred to as its trajectory. Projectile motion can be predicted and analyzed by physics, but it is not as straightforward as it may seem. The following are some of the properties of projectile motion: Acceleration due to gravity (9.8 m/s²) Act of the horizontal and vertical components of velocity (v) Path of the projectile in a parabolic shape. The horizontal component of the velocity will remain constant with time after the projectile is fired.
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what are some factors that may have caused errors in your measured values, and how could these have been avoided? how do the measured values for impulse compare to the calculated values for change in momentum?
Some factors which may cause errors in the measured values include inaccurate measuring instruments, poor technique, incorrect calculations, and poor experimental conditions.
What factors cause error in measured values?Some factors that may have caused errors in your measured values are: inaccurate measuring instruments, poor technique, incorrect calculations, and poor experimental conditions.
The impulse is equal to the change in momentum. The measured values for impulse and calculated values for change in momentum should be equal. The impulse is equal to the product of the average force applied to the object and the time during which it was applied. The change in momentum is equal to the product of the object's mass and its change in velocity, and it can be calculated using the equation Δp = mΔv.
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How does the star formation in spirals compare to the star formation of elliptical galaxies?
The spiral galaxies are characterized by the arms winding out from a central nucleus while the elliptical galaxies are characterized by their lack of structure or a central bulge.
Star formation refers to the process by which dense areas within molecular clouds in interstellar space, typically lasting tens of millions of years, form newborn stars. It takes a long time for stars to form, and this process is not well understood.
In comparison to spiral galaxies, elliptical galaxies have low star formation.
Furthermore, elliptical galaxies are made up of stars with a wide range of ages, indicating that the star formation process was rapid and early on in their history.
Spiral galaxies have more gas and dust in their disks than elliptical galaxies, and these are the sites of intense star formation.
The arms are believed to be regions of higher density of stars and interstellar material, as well as more significant gravitational interactions among stars, gas, and dust than in the rest of the disk.
Thus, spiral galaxies are sites of ongoing star formation while elliptical galaxies are mainly populated by old and evolved stars that no longer form. Therefore, spiral galaxies have a higher rate of star formation than elliptical galaxies.
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wo 0.20-kg balls, moving at 4 m/s east, strike a wall. Ball A bounces backwards at the same speed. Ball B stops. Which statement correctly describes the change in momentum of the two balls? a. Delta PB = Delta PA b. |Delta PB| = |Delta PA| c. |Delta PB| > |Delta PA| d. |Delta PB| < |Delta PA|e. Delta PB > Delta PA
The change in momentum of ball B is greater than the change in momentum of ball A (|Delta P_{B}| < |Delta P_{A}|) when two 0.20-kg balls, moving at 4 m/s east, strike a wall. Ball A bounces backwards at the same speed, while ball B stops.
When the two balls strike the wall, they experience a change in momentum due to the impulse of the wall.
The initial momentum of the system (two balls and the wall) is:
P_{initial}= m_{A}v_{A} + m_{B}v_{B}
After the collision, ball A bounces backwards with the same speed, so its final momentum is:
P_{A} = -m_{A}*v_{A}
Ball B stops, so its final momentum is:
P_{B} = 0
The total final momentum of the system is:
P_{final} = P_{A} + P_{B} = -m_{A}*v_{A}
The change in momentum of ball A is:
Delta P_{A} = P_{A} - m_{A}v_{A} = -2m_{A}*v_{A}
The change in momentum of ball B is:
Delta P_{B} = P_{B} - m_{B}v_{B} = -m_{B}v_{B}
Therefore, |Delta P_{B}| < |Delta P_{A}|, which means that option (d) is the correct answer.
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Module 25: AC Circuits Learn Question An inductor with inductance L is connected in series with an AC source that provides a sinusoidal voltage of v of t is equal to V times cosine of begin quantity omega times t end quantity, where V is the maximum voltage, omega is the angular frequency, and t is the time. If a second identical inductor is wired in series with the first inductor, what happens to the total inductive reactance, XL, of the circuit?
XL decreases by a factor of 2.
XL increases by a factor of 4.
XL decreases by a factor of 4.
XL increases by a factor of 2.
The total inductive reactance, XL, of the circuit increases by a factor of 2 when a second identical inductor is wired in series with the first inductor. Thus, option d is correct.
Inductive reactance is the opposition of an inductor to a change in current that produces a magnetic field. Inductive reactance is the inductive equivalent of resistive impedance.
It is measured in ohms and can be calculated using the following formula:
XL = 2πfL
where XL is the inductive reactance, f is the frequency of the applied voltage, and L is the inductance of the coil.
Since the two inductors are identical and the frequency of the AC source does not change, the total inductance of the circuit doubles, resulting in a factor of 2 increase in inductive reactance (XL). Thus, option d is correct.
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One object is placed on each shelf in the image above (W, X, Y, Z). The four objects have the same mass, 2.0 kg. Match each object to its potential energy.
Object W 7.84 J 15.7 J 13.4 J 0 J 23.5 J 5.62
Object X
Object Y
Object Z
Potential Energy of Object W, X, Y and Z are 0 J, 7.84 J, 15.7J and 23.5J, for better understand we have to know the meaning of potential energy.
What is Potential Energy?Potential energy in physics is the energy that an item retains as a result of its location in relation to other objects, internal tensions, electric charge, or other elements. Potential energy develops in systems having components whose configurations, or relative positions, determine the amount of the forces they apply to one another.
Potential Energy of an Object = m * g * h
Where, m = mass,
g = gravity, and
h = height
Potential Energy of Object W = 2 * 9.8 * 0
= 0 J
Potential Energy of Object X = 2 * 9.8 * 0.4
= 7.84 J
Potential Energy of Object Y = 2 * 9.8 * 0.8
= 15.68 J
≈ 15.7 J
Potential Energy of Object Z = 2 * 9.8 * 1.2
= 23.5 J
Therefore, Potential Energy of Object W, X, Y and Z are 0 J, 7.84 J, 15.7 J and 23.5 J.
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A slingshot sends a stone vertically upward from a height of 20 feet above a pool of
water. The starting speed of the stone is 90 feet per second. Its distance in feet, d.
above the water is given by the equation:
d-20+90t-16t^2, where t is the time in seconds after the launch.
Drag statements to the table to show what each coordinate labeled on the graph
represents in this problem situation.
the height of the stone when it is launched
the time when the stone hits the water
the time when the stone is launched the maximum height of the stone
the time when the stone reaches its maximum height
Coordinate
A
the height of the stone when it hits the water
What the Coordinate Represents
DRAG AND DROP
AN ITEM HERE
DRAG AND DROP
AN ITEM HERE
DRAG AND DROP
DRAG AND DROP
Coordinate , A - the height of the stone when it hits the water. A slingshot sends a stone vertically upward from a height of 20 feet above a pool of water.
What the Coordinate Represents?The coordinate A represents the height of the stone when it hits the water. When the stone hits the water, its height above the water surface is zero.
So, we can set the expression for the stone's height equal to zero and solve for t to find the time when the stone hits the water. The height of the stone when it is launched is given as 20 feet, which is a fixed value in this problem.
The time when the stone is launched is also a fixed value, which is zero. The maximum height of the stone is the highest point the stone reaches above its initial height of 20 feet. The time when the stone reaches its maximum height is the time at which the vertical velocity of the stone becomes zero.
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A ball is attached to the end of a string it swung at a vertical circle of three of 0.33M what is the minimum velocity that the ball must have to make it around the circle
Answer:
To make it around the circle, the tension in the string must provide the necessary centripetal force to keep the ball moving in a circle. At the top of the circle, the tension in the string must provide all the force to keep the ball moving in a circle. At the bottom of the circle, the tension in the string must provide the centripetal force in addition to the force of gravity.
We can use the centripetal force formula to solve for the minimum velocity: F_c = m * a_c
where F_c is the centripetal force, m is the mass of the ball, and a_c is the centripetal acceleration.
At the top of the circle, the centripetal force is equal to the tension in the string: F_c = T
where T is the tension in the string.
At the bottom of the circle, the centripetal force is equal to the sum of the tension in the string and the force of gravity:
F_c = T + mg
where m is the mass of the ball, g is the acceleration due to gravity (9.8 m/s^2), and T is the tension in the string.
The centripetal acceleration is given by: a_c = v^2 / r
where v is the velocity of the ball and r is the radius of the circle.
Since the circle has a radius of 0.33 m, we can substitute this into the equation for a_c: a_c = v^2 / 0.33
Combining these equations, we get:
At the top of the circle: T = m * v^2 / 0.33
At the bottom of the circle: T + mg = m * v^2 / 0.33
We can solve for the minimum velocity by using these two equations to eliminate the tension in the string: m * v^2 / 0.33 + mg = m * v^2 / 0.33
Simplifying this equation, we get: v = sqrt(0.33 * g)
Plugging in the values, we get: v = sqrt(0.33 * 9.8) = 1.81 m/s
Therefore, the minimum velocity that the ball must have to make it around the circle is 1.81 m/s
An object with a mass of
1.23 kg
starts from rest at the origin. It then experiences a force as a function of time
F =A i^+(B−Ct) j^
, where A=0.234 N, B=1.15 N and C=0.345 N/s. What is the speed of this object at t=3.00 s ?
Velocity refers to measuring the speed and direction of change in the position of an object. The speed of the object at t = 3.00 s is v = 0.35 m/s.
At t = 3.00 s, the object with a mass of 1.23 kg will have a speed given by the equation v = sqrt(2*F/m), where F is the total force experienced by the object and m is its mass.
Substituting the values for F, A, B, C and m, we get:
[tex]v = sqrt(2.(0,234.i+(1,15 - 0,345.3)j^)/1,23)[/tex]
Simplifying, we get:
v = [tex]sqrt(2.(0,234.j+(-0,035)j)/1,23)[/tex]
Using the Pythagorean theorem, we can calculate the magnitude of the vector v:
v = [tex]sqrt ((0,234.0,234) + (-0,035.-0,035))/1,23)[/tex]
Therefore, the speed of the object at t = 3.00 s is v = 0.35 m/s.
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When a ball bounces against a wall there will be large change in velocity in short period of time. This means the ____ is large, hence the net ___ must be proportionately large as well.
A change in velocity in short period of time means the acceleration is large, hence the net force must be proportionately large as well.
What is a force?A force is a physical quantity that induces a body to undergo an alteration in speed, direction of motion, or shape. A force can be classified as a push or a pull. When forces are equal, the forces are balanced and the object is not moving. Otherwise, if the forces are not equal, making it unbalanced will not give the object any movement.
The force that induces the change in the speed or direction of an object is referred to as a net force. The net force is equal to the product of the mass of the object and its acceleration. Newton (N) is the unit of measurement for force.
When a ball bounces against a wall, there will be a large change in velocity in a short period of time. This means the acceleration is large, hence the net force must be proportionately large as well.
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if the total mass is m , find the moment of inertia about an axis through the center and perpendicular to the plane of the square. use the parallel-axis theorem. express your answer in terms of the variables m and a .
The moment of inertia of the square about an axis through the center and perpendicular to the plane of the square is I = m a²/3.
Step by step explnation:
The moment of inertia about an axis through the center and perpendicular to the plane of the square can be found using the parallel-axis theorem. The moment of inertia about the center of the square is [tex]I_c_m[/tex] = (m a²)/6.
Using the parallel-axis theorem, the moment of inertia about an axis through the center and perpendicular to the plane of the square is I = [tex]I_c_m[/tex] + m a² = ma²/3.
Thus, the moment of inertia of the square about an axis through the center and perpendicular to the plane of the square is I = m a²/3.
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A pendulum has length / and a bob of mass m. Which of the following is true of the linear momentum of the bob as it swings through the lowest point? a. It remains constant because momentum is always conserved. b. It increases in magnitude and changes direction. c. It decreases in magnitude and does not change direction. d. It is converted to angular momentum. e. It is converted to kinetic energy.
The following is true of the linear momentum of the bob as it swings through the lowest point that it increases in magnitude and changes direction.
What is linear momentum ?Momentum (more specifically linear momentum or translational momentum) is defined in Newtonian mechanics as the product of an object's mass and velocity. It is a vector quantity with magnitude and direction. If m is the mass of an object and v is its velocity (also a vector quantity), then p = m * v. The kilogram meter per second (kgm/s) is the unit of momentum measurement in the International System of Units (SI), which is equivalent to the newton-second. According to Newton's second law of motion, the rate of change of a body's momentum is equal to the net force acting on it. Momentum depends on the frame of reference, but it is a conserved quantity in any inertial frame, which means that if a closed system
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suppose two protostars form at the same time, one with a mass of 0.5 msun and the other with a mass of 15 msun . which of the following statements are true? A) The 10MSun protostar will have a smaller change in surface temperature during this phase than the 0.5MSun protostar.
B) The 10MSun protostar will reach the main sequence cooler and fainter than the 0.5MSun protostar.
C) The 10MSun star will end its main-sequence life before the 0.5MSun star even completes its protostar stage.
D) The 10MSun protostar will have a smaller change in luminosity during the sequence shown than the 0.5MSun protostar.
E) The 10MSun protostar will be much more luminous than the 0.5MSun protostar.
The statements that are true are:
B) The 10MSun protostar will reach the main sequence cooler and fainter than the 0.5MSun protostar.
E) The 10MSun protostar will be much more luminous than the 0.5MSun protostar.
To understand why, we need to know that a star's mass determines its temperature, luminosity, and lifespan. More massive stars are hotter, more luminous, and have shorter lifespans than less massive stars.
In this case, the 15MSun protostar is much more massive than the 0.5MSun protostar. Therefore, statement B is true because the 10MSun protostar is closer in mass to the 15MSun protostar, and therefore it will have a higher temperature during the protostar phase, making it cooler and fainter when it reaches the main sequence.
Statement E is true because more massive stars are more luminous than less massive stars. The 10MSun protostar is closer in mass to the 15MSun protostar, and therefore it will be much more luminous than the 0.5MSun protostar.
Hence b and e are correct option.
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explain how angela can calculate the frictional torque applied to the wheel. state what apparatus is to be used.
Angela can calculate the frictional torque applied to the wheel by using a torque wrench. The torque wrench measures the amount of torque needed to rotate the wheel, which is equal to the frictional torque.
Calculating the frictional torque applied to a wheel.To calculate the frictional torque applied to a wheel, Angela can use a torque wrench. A torque wrench is a tool that is used to measure the amount of torque required to rotate the wheel.
When the wheel is turned with the torque wrench, the amount of torque needed to rotate it is equal to the frictional torque that the wheel is experiencing.
By measuring the torque required to rotate the wheel, Angela can calculate the frictional torque accurately.
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Which of the following values are needed to solve for the heat capacity of a heated unknown solid when it is placed in a coffee cup calorimeter? Select all that apply.
A. The initial temperature of the water
B. The initial temperature of the solid
C. The mass of the solid
D. The mass of the water in the cup
E. The final temperature of the system
The initial temperature of the solid, the mass of the solid, the mass of the water in the cup, and the final temperature of the system are needed to solve for the heat capacity of a heated unknown solid when it is placed in a coffee cup calorimeter.
The heat capacity is the amount of heat required to raise the temperature of a system by one degree Celsius (or one Kelvin). When an unknown solid is heated and placed in a coffee cup calorimeter, the following values are needed to calculate its heat capacity: Initial temperature of the solid, Mass of the solid, Mass of the water in the cup, Final temperature of the system.
The calorimeter is used to measure the amount of heat gained or lost by the system (the solid and the water in the cup) during the process. The change in temperature of the system is used to calculate the heat gained or lost by the solid.
Therefore, the initial temperature of the solid, the mass of the solid, the mass of the water in the cup, and the final temperature of the system are needed to solve for the heat capacity of the heated unknown solid.
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a hydrostatic transmission has pump volumtric efficiency 91 %, a pump mechanical efficiency of 93 %, a motor mechanical efficiency of 95%, and a motor volumetric efficiency of 91%. what is the overall efficiency of the hst (in percent)?
The hydrostatic transmission's overall efficiency in percent can be calculated using the given information as follows:
Given that:
Volumtric efficiency of the pump = 91%Mechanical efficiency of the pump = 93%Mechanical efficiency of the motor = 95%Volumetric efficiency of the motor = 91%Formula for calculating overall efficiency of HST is given as:
Overall efficiency of HST = pump volumetric efficiency × pump mechanical efficiency × motor mechanical efficiency × motor volumetric efficiencySubstituting the given values in the above formula, we get:
Overall efficiency of HST = 0.91 × 0.93 × 0.95 × 0.91 = 0.7460585 = 74.61%
Therefore, the overall efficiency of the hydrostatic transmission is 74.61% (rounded to two decimal places).
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