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 72 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!

xoxo123

  • Member
  • Posts: 335
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Did you know?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Lestidae is a rather small family of cosmopolitan, large-sized, slender damselflies. They are of the Lestidae is a rather small family of cosmopolitan, large-sized, slender damselflies. They are of the
Otitis media. This illustration shows an inflamed tympanic cavity, which is the most common source o Otitis media. This illustration shows an inflamed tympanic cavity, which is the most common source o
Varicosis. (a) Varicose veins develop due to the failure of valves in the superficial veins of the l Varicosis. (a) Varicose veins develop due to the failure of valves in the superficial veins of the l
Cross-sectional data showing that the amount of effort spent on personal health care increases with Cross-sectional data showing that the amount of effort spent on personal health care increases with
Telomere length is related to the amount of time adults spend in leisure time activity. Source: Ada Telomere length is related to the amount of time adults spend in leisure time activity. Source: Ada
Excessive video gaming decrease social and physical development in a child Excessive video gaming decrease social and physical development in a child
Video: Import of Dietary Glucose from Intestines to Bloodstream

For a complete list of videos, visit our video library