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
Physics & Space Science
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
Physics & Space Science
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