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A 30-kg girl and a 25-kg boy face each other on friction-freeroller skates. The girl pushes the boy, who moves away at aspeed of 2.0 m/s. What is the girl's speed?
A woman with mass 53.5 kg is standing on the rim of a large disk that is rotating at 0.510 rev/s about an axis perpendicular to it through its center. Calculate the magnitude of the total angular momentum
cold sodium atoms near absolute zero in a state called a bose-einstein condensate can slow the speed of light from its
As you finish listening to your favorite compact disc (CD),the CD in the player slows down to a stop. Assume that the CD spinsdown with a constant angular acceleration. *If the CD rotates at 500 rpm (rev
A telephoto lens consists of a converging front lens of focal length f1 and diverging back lens of focal length f2 separated by a distance d. Compute the effective focal length of the lens system
an incident wave d2.0 cm sin 4.5x-18t where x and t are in meters and seconds travels down a cord from a section with
You fly your 20.0m -long spaceship at a speed of c/ 4 relative to your friend. determine the speed of your friend relative to you
question1a bridge truss extends 200m across a river. the structure is free to slide horizontally to permit thermal
question1a single-turn square loop of side is centered on the axis of a long solenoid. in addition plane of the square
A 7.50-µC particle moves through a region of space where an electric field of magnitude 1250 N/C points in the positive x direction, and a magnetic field of magnitude 1.02 T points in the positive z direction.
The isotope 64Cu can decay by EC, beta- and beta + transtions, calculate the average enrgies of emitted beta- and beta +
Above the surface of the Earth, the magnitude of the acceleration due to gravity is inversely proportional to the square of the distance from the Earth's center.
Suppose a heat engine has an efficiency of 0.201 and produces 1.09×104 J of work. How much energy is pulled in from the hot reservoir? How much energy is rejected by the engine? (This energy is "exhausted" to the cold reservoir.))
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