Does the Doppler shift occur for only some types of waves or for all types of waves?

When timing the 100-m run, officials at the finish line are instructed to start their stopwatches at the sight of smoke from the starter’s pistol and not at the sound of its firing. Explain. What would happen to the times for the runners if the timing started when sound was heard?

Name two types of perception of sound and the physical characteristics of sound waves that correspond to them.

A fire truck is moving at 35 m/s, and a car in front of the truck is moving in the same direction at 15 m/s. If a 327-Hz siren blares from the truck, what frequency is heard by the driver of the car?

A baseball fan on a warm summer day $\left(30^{\circ} \mathrm{C}\right)$ sits in the bleachers 152 m away from home plate. a. What is the speed of sound in air at $30^{\circ} \mathrm{C}$? b. How long after seeing the ball hit the bat does the fan hear the crack of the bat?

A rock band plays at an 80-dB sound level. How many times greater is the sound pressure from another rock band playing at each of the following sound levels? a. 100 dB b. 120 dB

A sound wave has a frequency of 4700 Hz and travels along a steel rod. If the distance between compressions, or regions of high pressure, is 1.1 m, what is the speed of the wave?

The eardrum moves back and forth in response to the pressure variations of a sound wave. Sketch a graph of the displacement of the eardrum versus time for two cycles of a 1.0-kHz tone and for two cycles of a 2.0-kHz tone.

The eardrum moves back and forth in response to the pressure variations of a sound wave. Sketch a graph of the displacement of the eardrum versus time for two cycles of a 1.0-kHz tone and for two cycles of a 2.0-kHz tone.

Explain the difference between transverse waves and longitudinal waves. Give an example of each type.

How does a spring pulse reflected from a rigid wall differ from the incident pulse?

The sound from a trumpet travels at 351 m/s in air. If the frequency of the note is 298 Hz, what is the wavelength of the sound wave? A. $9.93 \times 10^{-4} \mathrm{m}$ B. 0.849 m C. 1.18 m D. $1.05 \times 10^{5} \mathrm{m}$

Give an example of a cosmic ray.

What is the wavelength of radio waves transmitted by a radio station with a frequency of 100 million cycles per second?