The propeller of a world war ii fighter plane is 2.30 m in diameter. (a) what is its angular velocity in radians per second if it spins at 1200 rev/min? (b) what is the linear speed of its tip at this angular velocity if the plane is stationary on the tarmac? (c) what is the centripetal acceleration of the propeller tip under these conditions? calculate it in meters per second squared and convert to multiples of g .
Answers: 3
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A1200 kg car traveling north at 10 m/s is rear-ended by a 2000 kg truck traveling at 30 m/s. what is the total momentum before and after the collision?
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With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90
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Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.
Answers: 2
The propeller of a world war ii fighter plane is 2.30 m in diameter. (a) what is its angular velocit...
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