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

Author Question: A siren emitting sound of frequency 1000 Hz approaches a stationary observer at one-half the speed ... (Read 114 times)

charchew

  • Hero Member
  • *****
  • Posts: 579
on: Jul 29, 2018
A siren emitting sound of frequency 1000 Hz approaches a stationary observer at one-half the speed of sound. The observer hears a frequency of
 
  A) 1000 Hz
  B) 2000 Hz.
  C) 500 Hz.
  D) 1500 Hz.
  E) none of the above.

Question 2

A particle of charge +2q is placed at the origin and particle of charge -q is placed on the x-axis at x = 2a. Where on the x-axis can a third positive charge be placed so that the net electric force exerted on it is zero?
 
  A) 3.4a
  B) 6.8a
  C) 8.6a
  D) 9.3a
  E) 1.0a


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mammy1697

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

B


charchew

  • Member
  • Posts: 579
Reply 2 on: Jul 29, 2018
Excellent

tkempin

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

The Transduction of Sound Vibrations in the Auditory System The Transduction of Sound Vibrations in the Auditory System
An Enzyme in Action Enzymes speed up reactions in your body An Enzyme in Action Enzymes speed up reactions in your body
When a 2.75-kg fan, having blades 18.5 cm long, is turned off, its angular speed decreases ... When a 2.75-kg fan, having blades 18.5 cm long, is turned off, its angular speed decreases ...
What is the frequency of 20-mm microwaves? (c = 3.0 × 108 m/s) A) 100 MHzB) 400 MHzC) 15 GHzD) ... What is the frequency of 20-mm microwaves? (c = 3.0 × 108 m/s) A) 100 MHzB) 400 MHzC) 15 GHzD) ...
If the period of a square wave is 22 ms, what is its frequency? If the period of a square wave is 22 ms, what is its frequency?
Frequency of Heterozygotes for Some Recessive Traits in Several Populations Frequency of Heterozygotes for Some Recessive Traits in Several Populations
Video: Energy inputs and release in glycolysis Animation

For a complete list of videos, visit our video library