Which of the following statements about stages of nuclear burning (i.e., first-stage hydrogen burning, second-stage helium burning, etc.) in a massive star is not true?
A) Each successive stage of fusion requires higher temperatures than the previous stages.
B) As each stage ends, the core shrinks further.
C) Each successive stage creates an element with a higher atomic weight.
D) Each successive stage lasts for approximately the same amount of time.
D
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Within the boundaries of the constellations Coma and Virgo are found:
A) all the galaxies in the Local Group. B) the most distant known quasars. C) the largest nearby superclusters of galaxies. D) the closest red dwarfs to the Sun. E) the Large and Small Magellanic Clouds.
A 50.0-kg person stands on a 200-kg raft, which is at rest. She starts to walk on the raft with a speed of 3.00 m/s with respect to the raft. What is the speed of the person relative to the water?
A) 2.40 m/s B) 0.225 m/s C) 0.500 m/s D) 0.750 m/s E) 1.20 m/s
Does sound travel faster in a warm room or a cold room? Explain your answer.
Our Galaxy is called the _____
A) Andromeda Galaxy B) Cartwheel Galaxy C) Milky Way Galaxy D) Pinwheel Galaxy