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A skydiver jumps out of a helicopter and falls freely for 9.0 s before opening the parachute.
(a) What is the skydiver's downward velocity when the parachute opens?
(b) How far below the helicopter is the skydiver when the parachute opens?
At a given instant an 55 mH inductor stored an energy of 73 µJ. What is the current in the inductor at this instant
suppose that a stray neutron with an initial speed of 2.3 times 107 ms is just barely captured by a nucleus with
Consider the two slit experiment with waves (e.g. in water). 1. Show the derivation of the interference term in the intensity of the wave.
A woman stands on a scale in a moving elevator. Her mass is 60.0 kg, and the combined mass of the elevator and scale is an additional 815 kg. What does the scale read during the acceleration
the human ear canal is about 2.3 cm long. if it is regarded as a tube open at one end and closed at the eardrum what is
A 55 kilogram person holds a weight of 20 kilogram on his head. Obtain what is the work done by him against gravity if he moves a distance of 20 meter on a horizontal road
the internal energy of the gas in a gasoline engines cylinder decreases by 205.1 J. if 65.0 J of work is done by the gas, how much energy is transferred as heat
A 6.50 x 105 kilogram subway train is brought to a stop from a speed of 0.500 meter per second in 0.400 m by a large spring bumper at the end of its track. Evaluate what is the force constant of the spring
A steel railroad track is 1.8 km long at 20.1°C. On a 48.8°C day, how much longer (in meters) is it than at the previous temperature?
A man is pulling his box that has a mass of 22 kg. What is the work done on the luggage by the lady, What is the power exerted on the box by the man
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. find the tension in the tightrope
The sphere of a Van de Graaff generator has a radius of 20 cm. The belt "pumps" charge into the sphere at a current of 0.22 ?A. Neglecting losses, What is the electric field inside the sphere
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