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Author Question: A photon is A) a high-energy electromagnetic wave. B) an electron that has been ejected from a ... (Read 38 times)

MGLQZ

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on: Jul 29, 2018
A photon is
 
  A) a high-energy electromagnetic wave.
  B) an electron that has been ejected from a metal surface by electromagnetic radiation.
  C) a particle-like quantum of radiation.
  D) one of the two types of nuclear particles.
  E) the anti-particle to the electron.

Question 2

A certain siren radiates sound uniformly in all directions. At a distance of 17 m from the siren, the intensity level is 49 db. How many watts of power does this siren put out? The threshold of human hearing is 1.0  10-12 W/m2.
 
  What will be an ideal response?


shaquita

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Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

2.9  10-4 W


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