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Author Question: Light can travel to Earth from a distant star, but sound cannot. Why is this? a. Light is an ... (Read 99 times)

wrbasek0

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on: Jul 28, 2018
Light can travel to Earth from a distant star, but sound cannot. Why is this?
 a. Light is an electromagnetic wave, and sound requires a medium.
  b. The Sun does not make sound.
  c. Light is a longitudinal wave, and sound is a transverse wave.
  d. The statement is false; both light and sound can travel in empty space.

Question 2

The number of states in the He+ ion corresponding to the principle quantum number n = 5 are
 a. 18
  b. 25
  c. 50
  d. 9
  e. 11


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upturnedfurball

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Reply #1 on: Jul 28, 2018
Answer to Question 1

a

Answer to Question 2

c


wrbasek0

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Reply 2 on: Jul 28, 2018
Wow, this really help

shewald78

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Reply 3 on: Yesterday
Excellent

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