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A ball of mass m on the surface of a planet of mass M and radius R is moved to a height R above the planet. The work done on the ball by gravity is?
A turboprop producing 1000 kW drives a propeller operating at 85% propulsive efficiency. If the fuel flow to the engine is 0.07 kg/s, determine the overall thermal efficiency of the engine.
A 0.54 kg mass at the end of a spring vibrates 10 times per second with an amplitude of 0.19 m. Determine the velocity when it passes the equilibrium point
A bicycle is turned upside down while its owner repairs a flat tire on the rear wheel. A friend spins the front wheel, of radius 0.386 m, and observes that drops of water fly off tangentially in an upward direction, find the magnitude of the averag..
A particle with charge +7.20 nC is in a uniform electric field directed to the left. What is the magnitude of the electric field
A 1/2 kg block of aluminum is heated to 200 C. It is quickly placed in an insulated tub of water at 0 C and sealed. What is the mass of the water
At a party, 5.00 kilogram of ice at-4.10°C is added to a cooler holding 30 liters of water at 20.0°C. Evaluate the temperature of the water when it comes to equilibrium
a child makes a ramp to push his toy dump truck up to his sand box.If he uses 5 newtons of force to push his 12 newton truck up the ramp
Calculate the change in potential energy of a 92.8 kg man when he takes an elevator from the first floor to 29th floor, if the distance between floors is 4.41 m.
Besides the gravitational force, a 3.05-kg object is subjected to one other constant force. Determine the other force
a boy hears an eco of his own voice from a distant hill after 1s. The speed of the sound is 340m/s. What is the distance of the hill from the boy
A 2600 kg automobile is traveling at 20 m/s when the brakes are applied. The braking force is 10192 N. Use work-energy methods for this problem. Determine the initial kinetic energy of the automobile
A jogger accelerates from rest to 3.49 m/s in 2.40 s. A car accelerates from 21.0 to 31.8 m/s also in 2.40 s, Find the magnitude of the acceleration of the jogger
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