The magnitude of the charge on an electron is approximately:
A) 1023 C
B) 10-23 C
C) 1019 C
D) 10-19 C
E) 109 C
D) 10-19 C
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A siren emitting sound of frequency 1000 Hz approaches a stationary observer at one-half the speed of sound. The observer hears a frequency of
A) 1000 Hz B) 2000 Hz. C) 500 Hz. D) 1500 Hz. E) none of the above.
If extra dimensions do exist, why wouldn't we see obvious evidence for them in everyday life?
a) because they affect only the strength of the strong force andnot of any other forces b) They are the same as the dimensions that we do perceive. c) They will only be present in the distant future. d) They were only present at the time of inflation and before. e) They would be quite small and hard to detect.
Which jovian planet has the most extreme seasonal changes, and why?
A) Uranus, because of its extreme axis tilt B) Jupiter, because of its large mass C) Saturn, because it has an axis tilt similar to Earth D) Neptune, because of its varying distance from the Sun
How many moons is Pluto known to have?
A) none B) three C) one D) four E) two