By how much has entropy of cube-water system changed
An 11.0 g ice cube at -21.0°C is put into a Thermos flask containing 110 cm3 of water at 20.0°C. By how much has the entropy of the cube-water system changed when a final equilibrium state is reached?
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A 9.5 g bullet is accelerated in a rifle barrel 35.9 cm long to a speed of 458 m/s. Use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated. Answer in units of N.
At the block is 31cm below the equilibrium point and moving upward with a speed of 98.0cm/s . What is the block's positon at t = 9s.
A harmonic wave is traveling along a rope. The oscillator that generates the wave completes 49.0 vibrations in 28.4 s. A given crest of the wave travels 406 cm along the rope in a time period of 11.8 s. What is the wavelength?
A circular wire loop of radius 8.1 m lies in a plane perpendicular to a uniform magnetic ?eld of magnitude 0.4 T. In 0.1 s the wire is reshaped into a square but remains in the same plane. What is the magnitude of the average induced emf in the wi
man pushes a lawn mower on a level lawn with a force to 200 N. If 50% of this force directed horizontally, how much work, in J, is done by the man in pushing the mower 7.2 m?
Your driveway is 3 meters long, and your house is 2.3 meters above the street. Assuming no friction, what is the speed of a 0.5 kg toy truck at the bottom of the driveway, if it starts from rest at the top?
Suppose that after a centrifuge in a medical laboratory is turned off, it continues to rotate with a constant angular deceleration for 10.4 s before coming to rest. How many revolutions did the centrifuge complete after being turned off?
Tarzan (m = 87 kg) tries to cross a river by swinging from a 10.0 m long vine. His speed at the bottom of the swing, just as he clears the water, is 9.0 m/s. Tarzan doesn't know that the vine has a breaking strength of 1.0 multiplied by 103 N. Wha
A 0.500-kg ball is thrown vertically upward with an initial speed of 10.0 m/s. If the initial potential energy is taken as zero, find the ball's
A 400kg ruck is moving with a velocity of 40km/h.it is stopped 25m beyond the point at which the brakes are applied. Find the retarding force
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