The proper abbreviation for ‘kilohertz' is ‘kHz.'
a. True
b. False
Indicate whether the statement is true or false
True
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Constant Angular Acceleration: A centrifuge in a medical laboratory rotates at a rotational speed of 3600 rev/min. When switched off, it makes 50 complete turns at a constant angular acceleration before coming to rest.(a) What was the magnitude of the angular acceleration of the centrifuge as it slowed down?(d) How long did it take for the centrifuge to come to rest after being turned off?
What will be an ideal response?
Three objects are connected as shown in the figure. The strings and frictionless pulleys have negligible masses, and the coefficient of kinetic friction between the 2.0-kg block and the table is 0.25. What is the acceleration of the 2.0-kg block?
A) 2.5 m/ B) 1.7 m/ C) 3.2 m/ D) 4.0 m/
Two masses are suspended by cord that passes over a pulley with negligible mass. The cord also has negligible mass. One of the masses, 
has a mass of 5.0 kg and the other mass,
has a mass of 3.0 kg. The acceleration of 
is
A. 3.3 
upward.
B. 3.3 upward.
C. 2.5 upward.
D. 2.5 upward.
E. 1.1 upward.
If the Moon is setting at noon, the phase of the Moon must be
A) full. B) first quarter. C) third quarter. D) waning crescent. E) waxing crescent.