A torque of 12 N ? m is applied to a solid, uniform disk of radius 0.50 m, causing the disk to accelerate at 5.7 rad/s2. What is the mass of the disk?
A) 17 kg
B) 13 kg
C) 8.5 kg
D) 4.3 kg
A
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Which one of the following experiments is the justification for the wave theory of light?
A) Frank-Hertz experiment B) Newton's rings experiment C) Huygens' experiment D) Young's double slit experiment E) none of the above
A device that produces electricity by transforming chemical energy into electrical energy is called a
A) generator. B) transformer. C) battery. D) none of the given answers
Which color best represents space as drawn in this chapters' figures?
a. blue b. white c. black d. red
An 80. kg man is skating Northward and happens to collide with a 20. kg boy who is ice skating toward the East. Immediately after the collision, the man and boy are seen to be moving together at 2.5 m/s in a direction 60 degrees North of East
How fast was the boy moving before the collision?