A sewing machine needle moves with a frequency of 2.5 Hz. Approximately how long does it take it to move from the highest point to the lowest point in its travel?
A) 0.40 s
B) 0.10 s
C) 0.20 s
D) 0.80 s
E) 1.25 s
C
Physics & Space Science
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An 8000 kg satellite is launched from the surface of the earth, and injected into outer space a long distance from the earth. The initial velocity needed to launch the satellite into outer space is 
A. 8,450 m/s. B. 9,200 m/s. C. 11,180 m/s. D. 18,900 m/s. E. 25,200 m/s.
Physics & Space Science
A simple harmonic oscillator oscillates with frequency f when its amplitude is A. If the amplitude is now doubled to 2A, what is the new frequency?
A) 4f B) f/2 C) f/4 D) 2f E) f
Physics & Space Science
The vertical height attained by a basketball player who achieves a hang time of a full 1 s is about
A) 0.8 m. B) 1 m. C) 1.2 m. D) 2.5 m. E) more than 2.5 m.
Physics & Space Science
The Paleocene is a(n)
a. epoch. b. era. c. eon. d. period.
Physics & Space Science