2018 Mod14

Question 1

Write out the definition for the following terms:

A. Transverse wave

Answer 1

A wave with a direction of propagation that is perpendicular to the direction of oscillation

Question 2

B. Longitudinal wave

Answer 2

A wave with a direction of propagation that is parallel to its direction of oscillation

Question 3

C. Supersonic speed

Answer 3

Any speed that is faster than the speed of sound in the substance of interest

Question 4

D. Sonic boom

Answer 4

Sound produced as a result of an object traveling at or above match 1

Question 5

E. Pitch

Answer 5

An indication of how high or low a sound is, which is primarily determined by the frequency of sound waves

Question 6

In designing a cars horn, the engineers the test the sound of the horn and decide that it is too it’s pitch is too low. To adjust the Warren, should the engineers change the electrons so as to produce the sound waves with longer or shorter wavelength

Answer 6

Shorter wavelengths

Question 7

What is The formula for finding the speed of sound

Answer 7

V =(331.5 + 0.6 • Temp.)m/sec.

Question 8

What is the formula for finding the frequency

Answer 8

frequency = speed over Wavelength

Question 9

What is the speed of in for infrasonic waves

Answer 9

Frequencies below 20 Hz

Question 10

What is the speed for ultrasonic sound waves

Answer 10

It’s waves with frequencies higher than 20,000 Hz

Question 11

What is the range of sonic waves

Answer 11

20 Hz to 20,000 Hz

Question 12

If a physicist takes an alarm clock and put in an airtight chamber when the chamber is sealed with still full of air the physicist is able to hear the alarm despite the fact that he is outside on the chair if the physicist then you say vacuum pump to evacuate essentially all the air out of the chamber, will the physicist still be able to hear the alarm wire why not

Answer 12

No. No air is in the chamber to make sound waves

Question 13

Are sound waves transverse waves or longitudinal waves

Answer 13

Longitudinal waves

Question 14

How do you find distance traveled

Answer 14

Distance traveled = speed of sound • Time

Question 15

Sound waves are traveling through the air and suddenly run into a wall. As a sound waves travel through the wall, did they travel faster, slower, or at the same speed when they are traveling in the air?

Answer 15

Faster

Question 16

In the situation described above what happens to the amplitude of the wave is the amplitude of the wave smaller, larger, or the same as the amplitude before the wave hit the wall

Answer 16

Smaller

Question 17

How do you find mach

Answer 17

Speed traveled divided by the speed of sound

Question 18

Why do jets travel at speeds of match one or higher only in sparsely populated regions

Answer 18

Because the boom made can damage ears and buildings

Question 19

Guitar player is parking on a string if he takes his finger and Finch is the string to the neck of the guitar so that it shortens doing the strain will the pitch of the sound in knitted increase decrease or stay the same

Answer 19

Increase

Question 20

You here to musical notes. They both have the same pitch the first is louder than the second if you compare the sound of the waves what aspects of the weave will be the same wavelength frequency speed or amplitude what aspects would be different

Answer 20

Wavelength frequency and speed would be the same. amplitude however would not

Question 21

Tomorrow when your neighbors car is stuck through is considered system only wearing. You watch your neighbor get into the car and drive away from you heading towards the nearest place for automobile service. Compare the picture the horn before he started to drive away do you good to hear when he is driving away from me

Answer 21

It will be lower

Question 22

You are riding your bicycle towards a stationary please car with the siren that is blaring away will the picture of the siren sound lower higher or the same as it will sound when you actually stop your bicycle assuming that the actual picture of the phone stays constant

Answer 22

Higher

Question 23

How many decibels are in one bel

Answer 23

10