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Two wheels have the same mass and radius of 4.8 kg and 0.54 m, respectively. One has (a) the shape of a hoop and the other (b) the shape of a solid disk. The wheels start from rest and have a constant angular acceleration with respect to a rotational axis that is perpendicular to the plane of the wheel at its center. Each turns through an angle of 14 rad in 9.6 s. Find the net external torque that acts on each wheel.
At a given instant in time, a traveling EM wave is noted to have its maximum magnetic field pointing west, what are the maximum values for the two fields
A skier starts from rest at the top of a hill that is inclined at 12.0° with the horizontal. The hillside is 180.0 m long, and the coefficient of friction between the snow and the skis is 0.0750. At the bottom of the hill, the snow is level and the c..
A uniform, cylindrical pulley of mass M=12.7 kg and radius R=0.636 m rotates freely about a fixed horizontal axis. What is the magnitude of the angular acceleration of the pulley
An object of mass 2.93 kg, moving with an initial velocity of (4.90i) m/s, Find the final velocity of the composite object
A football spends a total of 5 seconds in the air. It reaches a peak height of 30 meters. How long does it take to reach its peak height? The football has the range of 90 yards. What is its horizontal velocity.
Water is supplied to an office building 24.0 m high through a pipe at ground level. Find the minimum pressure in the supply pipe
A parallel-plate capacitor with plates of area 600 cm2 is charged to a potential difference V and is then disconnected from the voltage source. What is the charge Q on the positive plate of the capacitor
Starting at rest, two students stand on 12.5-kg sleds, which point away from each other on ice, and they pass a 5.50-kg medicine ball back and forth, How fast is the student on the right moving right after catching the ball
9.00g of aluminium at 200 degree celsius and 21.0g of copper are dropped 53.0cm^3 of ethyl alcohol at 15 degrees celsius. What is the initial temperature of the copper
A hiker, who weighs 919 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 4410 N, and rests on two concrete supports, one on each end. He stops 1/3 of the way along the bridge.
The source of a sound wave has a power of 1.60 µW. Assume it is a point source. What is the sound level at that distance
A golf ball strikes a hard, smooth floor at an angle of ? = 32.4° and, rebounds at the same angle. What is the magnitude of the impulse applied to the golf ball by the floor
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