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Home Q & A Board Science-Related Homework Help Physics Astronomy
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Arroyo21 Arroyo21
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6 years ago
Suppose that a source of sound is emitting waves uniformly in all directions. If you move to a point twice as far away from the source, the frequency of the sound will be
 
  A) unchanged.
  B) half as great.
  C) as great.
  D) twice as great.
  E) one-fourth as great.

Question 2

Isotopic analysis of a rock can tell us
 
  A) what the rock is made of
  B) the detailed geological history of the rock
  C) the temperature and pressure conditions under which it formed
  D) when the rock formed

Question 3

One horsepower is equal to
 
  A) 550. watts.
  B) 746. watts.
  C) 746. J.
  D) 550. J.
  E) 550. kW-h.

Question 4

All stars on the main sequence
 
  A) are in the process of forming
  B) are mature stars that are fusing hydrogen into helium in their cores
  C) are dead stars
  D) have exhausted their nuclear fuel and are in the process of dying
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rtstudentrtstudent
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6 years ago
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Arroyo21 Author
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#2
6 years ago
SoOoOoOo very smart
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