A compact disk rotates at 210 revolutions per minute. What is its angular speed in rad/s?
A) 11.0 rad/s
B) 22.0 rad/s
C) 45.3 rad/s
D) 69.1 rad/s
E) 660 rad/s
B
Physics & Space Science
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Assuming negligible friction, what spring constant would be needed by the spring in a "B-B gun" to fire a 10-g pellet to a height of 100 m if the spring is initially compressed by 0.10 m?
A) 20 N/cm B) 20 N/m C) 200 N/m D) 2000 N/cm E) 0.0020 N/m
Physics & Space Science
Which photo shows what we call a first-quarter moon? (Note: Assume these photos were taken in the Northern Hemisphere.)
A) 1 B) 2 C) 3 D) 4
Physics & Space Science
Why is light variability a critical issue with the sizes of active nuclei?
What will be an ideal response?
Physics & Space Science
If the volume of an object doubles with no change in mass, its density would be
A) half. B) double. C) unchanged.
Physics & Space Science