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Author Question: Why does the intensity of waves from a small source decrease with the square of the distance from ... (Read 73 times)

humphriesbr@me.com

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on: Jul 29, 2018
Why does the intensity of waves from a small source decrease with the square of the distance from the source?
 
  A) The waves run out of energy as they travel.
  B) The waves spread out as they travel.
  C) The medium through which the waves travel absorbs the energy of the waves.
  D) The waves slow down as they travel away from the source.
  E) The frequency of the waves decreases as they get farther from the source.

Question 2

Four waves are described by the following equations, where distances are measured in meters and times in seconds.
 
  I. y = 0.12 cos(3x - 21t)
  II. y = 0.15 sin(6x + 42t)
  III. y = 0.13 cos(6x + 21t)
  IV. y = -0.23 sin(3x - 42t)
  Which of these waves have the same speed?
  A) I and II
  B) I and III
  C) II and III
  D) III and IV
  E) II and IV
Physics ¦ Walker ¦ 5th Edition
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dajones82

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Reply #1 on: Jul 29, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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humphriesbr@me.com

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Reply 2 on: Jul 29, 2018
Gracias!

tandmlomax84

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Reply 3 on: Yesterday
Wow, this really help

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