A bus is designed to draw its power from a rotating flywheel that is brought up to its maximum speed (3000 rpm) by an electric motor. The flywheel is a solid cylinder of mass 250 kg and radius 0.500 m (Icylinder = MR2/2). If the bus requires an average power of 10.0 kW, how long will the flywheel rotate?

a. 154 s
c. 463 s
b. 308 s
d. 617 s


A

Physics & Space Science

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Energy Conservation With Conservative Forces: When you drop a pebble from height H, it reaches the ground with speed V if there is no air resistance. From what height should you drop it so it will reach the ground with twice speed?

A. H
B. 2H
C. 4H
D. 8H
E. 16H

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When did Copernicus live?

A) about 500 years ago B) about 1000 years ago C) about 2000 years ago D) about 100 years ago E) about 5000 years ago

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The dimensional equivalent of the quantity impulse in terms of the fundamental quantities (mass, length, time) is which of the following?

a. MLT c. MLT-1 b. ML2T-2 d. MLT-2

Physics & Space Science

What is the total internal energy of 2.00 moles of an ideal gas at 100 K?

A. 3,670 J B. 3,250 J C. 2,750 J D. 2,490 J E. 1,950 J

Physics & Space Science