Gas and dust distributed among the stars is known as the _______________
a. interstellar vacuum
b. interstellar void
c. Oort cloud
d. interstellar medium
d
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Doubling both charges changes the potential energy for a pair of point charges by a factor of
A. 2. B. 4. C. 1?2. D. 1?4. E. 1 (no change).
How many powers of ten separate the diameter of the Solar System and the diameter of the Milky Way Galaxy?
A: 10. B: 8. C: 6. D: 4. E: 12.
Entropy is a measure of order. The more order there is, the higher the system's entropy
Indicate whether the statement is true or false
The starship Enterprise locks onto an alien ship (whose mass is much greater than the Enterprise's mass) with its tractor beam (think of this as a futuristic rope) and starts to pull the alien ship toward it. Neither ship has its propulsion engines running. Which ship has greater acceleration towards the other?
A. They both move with equal acceleration B. The alien ship C. The Enterprise D. Neither ship can move because there is no friction in outer space