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An individual lifts a 95-kg weight to a height of 2.13 m. When the weight is held overhead, what is the potential energy? What is the kinetic energy?
A golf ball of mass 50 g released from a height 1.5m above a concrete floor bounces back to a height of 1.0 m. What is the amount of energy lost during the impact
a current carrying wire of length 0.5m is at the equator. assuming that the magnetic field of the earth has a magnitude
how does the electrostatic potential energy of a system of two positive point charges change when the distance between
The supersonic aircraft Concorde has a length of 61.6m when sitting on the ground on a typical day when the temperature is 12.0C . The Concorde is primarily made of aluminum
The membrane of the axon of a nerve cell is a thin cylindrical shell of radius r = 10-5 m, length L = 0.42 m, and thickness d = 10-8 m. Find the electric field through the membrane
A person notices a mild shock if the current along a path through the thumb and index finger exceeds 80 μA. Find the maximum allowable potential difference without shock across the thumb and index finger for a dry-skin resistance of 4 x 10^5 Ω.
A hunter aims directly at a target (on the same level) 150 m away. At what angle should the gun be aimed so as to hit the target
A car is driving directly north on the freeway at a speed of 117 km/h and a truck is leaving the freeway driving 76 km/h in a direction that is 40° west of north. What is the velocity of the truck relative to the car?
a 5600 kg mass car is taking a turn at 72 ms. if the frictional force here is 44000n what is the radius of curvature
A rock is suspended from the string and moves downward at constant speed. Which statement is true concerning the tension in the string if air resistance is ignored.
if a wire carries a flowing bunch of charges each magnitude q and if the wire rests in a magnetic field b then each
A 5.4 m-long rod of (constant diameter 4.6 mm) is made of 2.0 m of copper and the remainder of aluminum (see above). What is the heat flow rate through the composite rod
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