Coulomb's Law: Two point charges each experience a 1-N electrostatic force when they are 2 cm apart. If they are moved to a new separation of 8 cm, what is the magnitude of the electric force on each of them?
A. 2 N
B. 1/2 N
C. 1/4 N
D. 1/8 N
E. 1/16 N
Answer: E
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Free Fall: A test rocket at ground level is fired straight up from rest with a net upward acceleration of 20 m/s2. After 4.0 s, the motor turns off but the rocket continues to coast upward with insignificant air resistance. What maximum elevation does the rocket reach?
A. 160 m B. 330 m C. 320 m D. 410 m E. 490 m
The dark bands in the interference pattern in Young's double slit experiment are created by
A. Light from the window B. Constructive interference C. Destructive interference D. Physicists still aren't sure.
Nuclear fusion is a process in which
A) atoms combine into molecules. B) two or more light nuclei are combined into a single heavier nucleus. C) a heavy nucleus is split into two or more lighter nuclei. D) a small particle is spontaneously emitted from a nucleus. E) None of the above.
What happens if nearly saturated air experiences a quick, significant temperature drop?
A) Relative humidity drops. B) Relative humidity rises. C) Condensation occurs. D) Outcome depends on the temperature of the air.