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You are designing a lathe motor, part of which consists of auniform cylinder whose mass is 90 kg and whose radius is 0.40 mthat is mounted so that it turns without friction on its axis,which is fixed. The cylinder is driven by a belt that wraps around its perimeter and exerts a constant torque. At t = 0, thecylinder‘s angular velocity is zero. At t = 25 s,its angular speed is 500 rev/min. (a) What is themagnitude of the cylinder‘s angular momentum at t =25 s? (b) At what rate is the angular momentum increasing?(c) What is the magnitude of the torque acting on thecylinder? (d) What is the magnitude of the frictional force acting on the rim of the cylinder?
in a velocity selector the uniform magnetic field of 1.5 t is produced by a large magnet. two parallel plates with a
The generator at a power plant produces AC at 24000 V. A transformer steps this up to 345,000 V for transmission over power lines. how many turns must there be in the output coil
A coin is placed 8.0 cm in front of a concave mirror. The mirror produces a real image that has a diameter 4x larger thanthat of the coin. What is the image distance
A cat dozes on a stationary merry-go-round, at a radius of 5.4 m from the center of the ride. Then the operator turns on the ride and brings it up to its proper turning rate of one complete rotation every 6.2 s
riders on the amusement ride rotor are pressed against the wall of a certical cylinder of radius 3 m while rotating 10
An ideal monatomic gas expands isothermally from 0.600 m3 to 1.25 m3 at a constant temperature of 800 K. If the initial pressure is 8.00 10^4 Pa. Find the thermal energy transfer Q
an 97.6 g lead ball is dropped from rest from a height of 4.57 m. the collision between the ball and the ground is
Another approach to the Lorentz Transformations. Relativists often use a quantity calledrapidity to describe the frame transformations. determine the function f(R)
An object 2.6 cm high is placed 15 cm from the surface of a polished silver sphere of radius 11 cm. Find the location, size, and orientation of the image
A 51.0-g Super Ball traveling at 27.0 m/s bounces off a brick wall and rebounds at 21.5 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.75 ms,
What is the repulsive force between two pith balls that are 12.0 cm apart and have equal charges of -26.0 nC?
Suppose a news report stated that starship Enterprise had just returned from a 5 year voyage while traveling at 0.81c. how much time elapsed on the ship
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