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A grinding wheel in the shape of a solid disk is 0.300 m in diameter and has a mass of 2.50 kg . The wheel is rotating at 2200 about an axis through its center. What is its kinetic energy? How far would it have to drop in free fall to acquire the same amount of kinetic energy?
Dr Jeeves has invented a new kind of heat engine that operates using a pool of molten copper at 1083 degrees celcius and a block of solid lead at 327 degrees celcius. How much power is produced by the engine
By means of a rope whose mass is negligible, two blocks are suspended over a pulley, as the drawing shows, with m1 = 11.7 kg and m2 = 43.9 kg. find the mass of the pulley
Calculate the maximum value of resistance that can be obtained by combining resistors of 31 , 47 , and 64
The Hall effect can be used to determine the density of mobile electrons in a conductor. Find the density of mobile electrons in the material
A block of mass m = 309 g is dragged with a string across a rough horizontal table. The string tension is T = 3.59 N, What is the power supplied by the force of friction
A 120-V fish tank heater has a power rating of 112 W. Calculate the resistance of the heater and Calculate the current through the heater
a ramp consisting of a large piece of cardboard poster board or similar thin and smooth materiala toy car such as a
A 150 g aluminum cup contains 150 g of water and both are at 13 C. If you add 150 g of hot water at 90 C what is the final temperature at thermal equilibrium? How much hot water at 90 C needs to be added to achieve a final temperature of 44 C?
The magnitude of the force exerted by a spring is given by F = kx where x is the amount of stretching/compressing of the spring. What must be the units associated with k expressed in terms of fundamental SI units?
A loudspeaker on a homecoming float - mounted on a pole -- is stuck playing at an annoying 210 Hz tone, What is the intensity of the signal at this point, What is the power of the speaker
a solenoid with length of 2.71 m and N= 311 turns/m carries a current 2.63 A. It stores 2.57 J of energy. What is the cross-sectional area of the solenoid
Two very large charged parallel metal plates are 10.0 apart and produce a uniform electric field of 2.80×106 between them. How much work has the electric field done on this proton
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