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A proton moves from a location where V =93 V to a spot whereV = -22 V.
a) What is the change in the proton's kineticenergy?b) If we replace the proton with an electron, what is the changein kinetic energy?
a 10 kg block is pushed against a vertical wall by a horizontal force of 100n . the coefficient of static friction is
What is the radius r of the iron ball?
A nozzle of inner radius 1.05 mm is connected to a hose of inner radius 8.03 mm. The nozzle shoots out water moving at 25.5 m/s. At what speed is the water in the hose moving
Two thermal reservoirs ("hot", TH = 124°C and "cold", TC = 10.0°C) are put into thermal contact by a lead slab. Find the initial rate of heat conduction for each reservoir
The distance between two telephone poles is 48.0 m. while a 0.600 kg bird lands on the telephone wire midway between the poles, the wire sags 0.200 m. Draw a free-body diagram of the bird. (Do this on paper. Your instructor might ask you to turn i..
The range of human hearing extends from approximately 20 Hz to 20000 Hz. Find out the wavelengths of these extremes while speed of sound in air is equal to 348 m/s.
The total area of an airplane's wings is 40.0m2 and it's weight is 49.0KN. the density of air is 1.3kg/m3. calculate the speed over the bottom surface
a pendulum consists of a 2.0 kg stone swinging on a 3.9 m string of negligible mass. the stone has a speed of 7.2 ms
a juggler traveling in a train on level track throws a ball straight up relative to the train with a speed of 6.65 ms.
A 1432.0 g mass is on a horizontal surface with μk = 0.44, Calculate the distance the spring was compressed. What is the velocity of the mass as it loses contact with the spring
A small welding machine uses a voltage source of 120 V at 60 Hz. When the source is operating, it requires 1200 W of power, and the power factor is .75. FInd the rms current in the machine while operating
A heat engine operates between two reservoirs whose temperatures are 139.3°C, What is the maximum efficiency of this engine
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