Mastering Physics Solutions: Exercise 14.18

Mastering Physics Solutions: Exercise 14.18

On December 19, 2011, in Chapter 14: Sound, by Mastering Physics Solutions

Part A = d = 24.7m Click to use the calculator/solver for this part of the problem

A bat moving at 15.0 m/s emits a high-frequency sound as it approaches a wall that is 27.0 m away. Assuming that the bat continues straight toward the wall, how far away is it when it receives the echo? (Assume the air temperature in the cave to be 0° C).

Click for More...

Tagged with:  

Mastering Physics Solutions: Exercise 14.12

Mastering Physics Solutions: Exercise 14.12

On December 19, 2011, in Chapter 14: Sound, by Mastering Physics Solutions

Part A = d = 133m Click to use the calculator/solver for this part of the problem

A person holds a rifle horizontally and fires at a target. The bullet has a muzzle speed of 200 m/s, and the person hears the bullet strike the target 1.05 s after firing it. The air temperature is 72° F. What is the distance to the target?

Click for More...

Tagged with:  

Mastering Physics Solutions: A Vibrating String

Mastering Physics Solutions: A Vibrating String

On December 19, 2011, in Chapter 14: Sound, by Mastering Physics Solutions

Part A = The wavelength doubles but the wave speed is unchanged.
Part B = Both wavelength and wave speed are unchanged.

An oscillator creates periodic waves on a stretched string. If the period of the oscillator doubles, what happens to the wavelength and wave speed?

Click for More...

Tagged with:  

Mastering Physics Solutions: Waves on Strings

Mastering Physics Solutions: Waves on Strings

On December 19, 2011, in Chapter 14: Sound, by Mastering Physics Solutions

Part A = wave speed, wavelength
Part B = none of the above

An oscillator creates periodic waves on two strings made of the same material. The tension is the same in both strings. If the strings have different thicknesses, which of the following parameters, if any, will be different in the two strings?

Click for More...

Tagged with:  

Mastering Physics Solutions: The Doppler Effect on a Train

Mastering Physics Solutions: The Doppler Effect on a Train

On December 19, 2011, in Chapter 14: Sound, by Mastering Physics Solutions

Part A = fapproach = 302Hz Click to use the calculator/solver for this part of the problem
Part B = frecede = 228Hz Click to use the calculator/solver for this part of the problem

A train is traveling at 30.0 m/s relative to the ground in still air. The frequency of the note emitted by the train whistle is 262 Hz. What frequency fapproach is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and approaching it?

Click for More...

Tagged with:  

Mastering Physics Solutions: Doppler Shift

Mastering Physics Solutions: Doppler Shift

On December 19, 2011, in Chapter 14: Sound, by Mastering Physics Solutions

Part A = traveling away from the listener
Part B = medium (such as air or water)
Part C = traveling toward the source
Part D = medium
Part E = 1/2fs
Part F = 0
Part G = It approaches infinity.

The velocity of the source is positive if the source is ______________. Note that this equation may not use the sign convention you are accustomed to. Think about the physical situation before answering.

Click for More...

Tagged with: