What is a shock front?
A) a wave of pressure that moves faster than the speed of sound
B) a wave of pressure that moves slightly slower than the speed of sound
C) a wave of pressure that moves faster than the speed of light
D) a wave of electromagnetic energy that can create electrical shocks
E) the wave created when protons slam into electrons
Correct Answer:
Verified
Q10: What is a superbubble?
A)a very low-density region
Q11: Which of the following comprise the oldest
Q12: How are interstellar bubbles made?
A)by the collapse
Q13: Why are we unlikely to find Earth-like
Q14: Sound waves in space
A)do not exist.
B)travel so
Q16: What do astronomers consider heavy elements?
A)elements that
Q17: What makes up the interstellar medium?
A)open clusters
B)O
Q18: Where are most heavy elements made?
A)in the
Q19: How does the interstellar medium obscure our
Q20: What is the thickness of the disk
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