A person in the distance is hammering a nail into a board. You see the hammer strike the nail before you hear the sound. Explain.
Question 2
2.
The wavelength of sound coming from a loudspeaker is halved.
a. Does the frequency of the sound waves increase, decrease, or stay the same? Explain.
b. Does the speed of the sound waves increase, decrease, or stay the same? Explain.
Question 3
3.
Dolphins of the open ocean are classified as Type II Odontocetes (toothed whales). These animals use ultrasonic “clicks” with a frequency of 54kHz to navigate and find prey.
a. Suppose a dolphin sends out a series of clicks that are reflected back from the bottom of the ocean 79m below. How much time elapses before the dolphin hears the echoes of the clicks? (The speed of sound in seawater is 1530 m/s)
b. What is the wavelength of a 54kHz sound in the ocean?
Question 4
4.
To tune middle C on a piano, a tuner hits the key and at the same time sounds a 261-Hz tuning fork. If the tuner hears 4 beats per second, what are the possible frequencies of the piano key?
Question 5
5.
What is a medium?
Question 6
6.
Describe the difference between a compressional wave with a large amplitude and one with a small amplitude.
Diagram B. Refer to the picture and answer questions 7,8,9.
Question 7
7.
Using the picture of the sound wave, which show(s) the WAVELENGTH?
Question 8
8.
Using the picture of the wave, which show(s) the COMPRESSION?
Question 9
9.
Using the picture of the wave, which show(s) the RAREFACTION?
Question 10
10.
A tuning fork has a frequency of 280 hertz, and the wavelength of the sound produced is 1.14 meters. Calculate the velocity of the wave.
Question 11
11.
With the information from the previous question determine what the temperature of the air where the tuning fork is . ( write your answer in below with no units)
Measure. Use the grid of the graph to measure each attribute of the wave shown. Do not include units in your answer.
Question 12
12.
How many waves are in the picture?
Question 13
13.
You are about to cross the street; when a police car comes flying by you with it's sirens screaming. You hear the police car approach you and then pass you. You notice
Question 14
14.
What is the equation used to calculate the Doppler Shift?
Question 15
15.
Infrasound includes any sound with wave frequencis lower than_______Hz. ( enter the numeric answer below)
Question 16
16.
You hear two sounds one has a loundess of 20dB and the other has a loudness or 70dB how many more times greater is the energy reaching your ear for the louder sound? ( enter the numeric answer below)
Question 17
17.
What wave phenomenon caused the Tacoma Bridge collapse