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A firm wants to estimate the amount of frictional torque in the incurrent line of grindstones, so they can redesign them to be more energy efficient. To do this, they ask you to test the best-selling model, which is basically a disk shaped grindstone of mass 1.3 kilogram and radius 7.50 centimeter which operates at 720 rev/min. When the power is shut off, you time the grindstone and find it takes 32.3 second for it to stop rotating.
(a) Find the angular acceleration of the grindstone?
(in rad/s2)
(b) Find the frictional torque exerted on the grindstone?
(N*m)
A monatomic ideal gas is held in a thermally insulated container with a volume of 0.0850m^3 . The pressure of the gas is 105kPa , and its temperature is 357K a)To what volume must the gas be compressed to increase its pressure to 150kPa b)At what ..
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he density of free electrons in gold is 5.90x10^28 m^-3. The resistivity of gold is 2.44x10^-8 ohms.m at a temperature of 20 C, what is the drift velocity of the electrons in the wire
A farsighted person uses glasses with a refractive power of 3.6 diopters. What is this person's near point when not wearing glasses
an infinitely long cylindrical insulating shell of inner radius a and outer radius b has a uniform volume charge
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