A CD has a diameter of 12.0 cm. If the CD is rotating at a constant angular velocity of 20.0 radians per seconds, then the frequency of the rotational motion is
A. 2.14 Hz.
B. 3.18 Hz.
C. 3.83 Hz
D. 4.50 Hz.
E. 4.89 Hz.
B. 3.18 Hz.
Physics & Space Science
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Sixty miles/hour is about how many meters/second?
A) 96 B) 112 C) 1.6 D) 27 E) 37
Physics & Space Science
The charge flowing through a light bulb attached to a 12.0-V battery in 13.0 s is 30.0 C. What is the average power supplied by the battery during this process?
a. 360 W b. 12.0 W c. 27.7 W d. 5.20 W e. 30.0 W
Physics & Space Science
Starting from rest at t = 0, a 5.0-kg block is pulled across a horizontal surface by a constant horizontal force having a magnitude of 12 N. If the coefficient of friction between the block and the surface is 0.20, at what rate is the 12-N force doing work at t = 5.0 s?
a. 0.13 kW b. 0.14 kW c. 0.12 kW d. 26 W e. 12 W
Physics & Space Science
A neutron can be described as all of the following except:
Physics & Space Science