This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Why does the intensity of waves from a small source decrease with the square of the distance from ... (Read 23 times)

humphriesbr@me.com

  • Hero Member
  • *****
  • Posts: 550
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
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

dajones82

  • Sr. Member
  • ****
  • Posts: 359
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.
Answer Preview
Only 39% of students answer this correctly


humphriesbr@me.com

  • Member
  • Posts: 550
Reply 2 on: Jul 29, 2018
Gracias!

cassie_ragen

  • Member
  • Posts: 347
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

Did you know?

Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

Did you know?

The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Punnett square illustrating the genotypes underlying a 9 : 3 : 3 : 1 ratio Punnett square illustrating the genotypes underlying a 9 : 3 : 3 : 1 ratio
A small herd of Przewalski's Horses A small herd of Przewalski's Horses
Head-Tail Source NGC 1265 Head-Tail Source NGC 1265
Model of a sequential study in which two cohorts were followed beginning at age 20. One cohort was f Model of a sequential study in which two cohorts were followed beginning at age 20. One cohort was f
Intensity and Wavelengths of Emitted Radiation Intensity and Wavelengths of Emitted Radiation
Cover heat source to slow cooling by placing a towel over it. Cover heat source to slow cooling by placing a towel over it.
Video: Elementary kinetics

For a complete list of videos, visit our video library