Multiple Choice
Sound waves in space
A) do not exist.
B) travel so slowly that they are unnoticeable.
C) travel much faster than sound on Earth but have such low density that they are inaudible.
D) travel much faster than sound on Earth and are therefore very loud.
E) can travel through the halo but not the disk of the galaxy.
Correct Answer:
Verified
Correct Answer:
Verified
Q38: Which of the following statements about the
Q39: What do we mean by a protogalactic
Q40: The Milky Way looks the same in
Q41: What kinds of objects lie in the
Q42: Suppose you discovered a star made purely
Q44: Suppose you read somewhere that 10 percent
Q45: What evidence suggests that the protogalactic cloud
Q46: How should we expect the Milky Way's
Q47: Where do most dust grains form?<br>A)in supernovae<br>B)in
Q48: How did star formation likely proceed in