In the above H-R diagram sketch, which star is a blue giant?
A. A
B. B
C. C
D. D
E. E
Answer: A
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The spectral sequence sorts stars according to
A) mass. B) surface temperature. C) luminosity. D) core temperature. E) radius.
A nucleon has more mass on average when it is
A) inside the nucleus. B) removed from the nucleus. C) both the same
If an extrasolar planet suddenly became more massive, but kept the same radius and orbit, what would change during an observed transit?
A) The amount of starlight would have a larger dip during the transit. B) The amount of starlight would have a smaller dip during the transit. C) The time between transits would decrease. D) The time between transits would increase. E) Nothing. The mass of a planet does not affect the appearance of a transit.
A 20 N ball and a 40 N ball are dropped at the same time from a height of 10 meters. Air resistance is negligible. Which of the following statements is accurate?
A. After 1 second has elapsed, both balls have the same kinetic energy, since they have the same acceleration B. Both balls hit the ground at the same time but gravity does more work on the heavy ball than on the light ball C. The heavy ball has a greater acceleration and falls faster D. The light ball has a greater speed, since it can accelerate faster than the heavy ball