Which of the following is a scalar quantity?
A) velocity
B) acceleration
C) displacement
D) mass
E) force
D
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A 4.00 kg mass is connected to a spring with a spring constant of 9.00 N/m. The velocity is given by the expression v(t) = 8.00 cm/s sin
What is the maximum acceleration of the simple harmonic motion?
A. 10.0 
B. 16.2
C. 19.2
D. 20.2
E. 24.5
How many times does the Moon rotate on its axis in one orbital period?
A. several times B. twice C. only once D. The Moon does not rotate.
If Star A is twice as far as Star B, and they are identical in all other ways, then the brightness of Star A would be
A. the same brightness as Star B. B. twice the brightness of Star B. C. one-fourth the brightness of Star B. D. four times the brightness of Star B. E. one-half the brightness of Star B.
Like supernovae, quasars must end with a violent explosion
Indicate whether the statement is true or false