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A 33.7-m length of copper wire at 20.0°C has a radius of 0.23 mm. If a potential difference of 7.0 V is applied across the length of the wire, determine the current in the wire.
A hollow sphere of radius 0.15 m, with rotational inertia I = 0.078 kg m2 about a line through its center of mass, What is the speed of the center of mass of the sphere at the initial position
If the contact time between bat and ball is 2.80×10?3s , calculate the average force between the ball and bat during contact
Two radio waves are used in the operation of a cellular telephone. To receive a call, the phone detects the wave emitted at one frequency by the transmitter station or base unit. determine the difference between the two frequencies used in the oper..
A uniform narrow tube 1.80m long is open at both ends. It resonates at two successive harmonics of frequencies 279Hz, What is the speed of sound in the gas in the tube
a hoop, a disk, and a solid sphere each have a mass 1.4kg and a diameter 16cm. find the speed of each at the bottom
A solid uniform 38.9kg ball of diameter 36.2cm is supported against a vertical frictionless wall using a thin 30.0cm wire of negligible mass. how hard does the ball push against the wall
An 18 mm wide diffraction grating has rulings of 710 lines per mm. What is the largest angle from the normal at which an intensity maximum is formed
A constant force of 25N acts on an object having a mass of 2kg for 3 seconds. What is the magnitude of the change in the object's momentum
A 2.93-kg model rocket is launched vertically upward with sufficient initial speed to reach a height of 3.71·102 m, even though air resistance (a nonconservative force) performs -6.11·102 J of work on the rocket.
a 55 kg swimmer is standing on a stationary 175 kg floating raft. the swimmer then runs off the raft horizontally with a velocity of + 3.7 m/s realtive to the shore. Find the recoil velocity that the raft would have
A 31.0-kg crate rests on a horizontal floor, and a 72.5-kg person is standing on the crate. Determine the magnitude of the normal force that the crate exerts on the person
A certain compact disc player draws a current of 340 mA at 27.0 V. How much power is required to operate the player
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