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

Author Question: When you hear the horn of a car that is approaching you, the frequency that you hear is larger than ... (Read 153 times)

joe

  • Hero Member
  • *****
  • Posts: 627
on: Jul 28, 2018
When you hear the horn of a car that is approaching you, the frequency that you hear is larger than that heard by a person in the car because for the sound you hear
 a. wave crests are farther apart by the distance the car travels in one period. b. wave crests are closer together by the distance the car travels in one period. c. the car gets ahead of each wave crest before it emits the next one. d. the speed of sound in air is increased by the speed of the car.
  e. a speeding car emits more wavecrests in each period.

Question 2

A truck moving at 36 m/s passes a police car moving at 45 m/s in the opposite direction. If the frequency of the siren is 500 Hz relative to the police car, what is the change in frequency (in Hz) heard by an observer in the truck as the two vehicles pass each other? (The speed of sound in air is 343 m/s.)
 a. 242
  b. 238
  c. 240
  d. 236
  e. 234


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

leannegxo

  • Sr. Member
  • ****
  • Posts: 374
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

C


joe

  • Member
  • Posts: 627
Reply 2 on: Jul 28, 2018
Thanks for the timely response, appreciate it

jamesnevil303

  • Member
  • Posts: 337
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

The American clipper ship, Red Jacket, off Cape Horn, sails from Australia to Liverpool, England, in The American clipper ship, Red Jacket, off Cape Horn, sails from Australia to Liverpool, England, in
Normal oxygen sensor frequency is from about one to five times per second. Normal oxygen sensor frequency is from about one to five times per second.
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) ...
Frequency distribution of phenotypes from the possible offspring in Figure 5.7. Height of the offspr Frequency distribution of phenotypes from the possible offspring in Figure 5.7. Height of the offspr
The relationship between allelic frequency and genotypic frequency in a population that is in Hardy- The relationship between allelic frequency and genotypic frequency in a population that is in Hardy-
Genetic drift of an allele frequency Genetic drift of an allele frequency
Video: Introduction to Diabetes

For a complete list of videos, visit our video library