Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
9th Grade Physical S
Final Exam-Module 14
| Question | Answer |
|---|---|
| Transverse wave | A wave with a direction of propagation that is perpendicular to its direction of oscillation. |
| Longitudinal wave | A wave with a direction of propagation that is parallel to its direction of oscillation. |
| Supersonic speed | Any speed that is faster than the speed of sound in the substance of interest. |
| Sonic Boom | The sound produced as a result of an object travelling at or above Mach 1. |
| Pitch | An indication of how low or how high a sound is, which is primarily determined by the frequency of the sound wave. |
| A popular science fiction movie was advertised with the slogan, "In space, no one can hear you scream." Why is this a true statement? | There is no air in space. Therefore, sound cannot travel because there is no medium for them to oscillate. |
| A physicist takes an alarm clock and puts it in an airtight chamber. If the physicist then uses a vacuum pump to evacuate essentiallyall of the air out of the chamber, will he still be able to hear the alarm? Why or why not? | No. With no air the sound waves have nothing to travel through. |
| Do sound waves oscillate parallel to or perpendicular to the direction in which the wave travels? | Parallel |
| Are sound waves transverse waves or longitudinal waves? | Longitudinal |
| Which waves ahve the longest wavelength: sonic waves, infrasonic waves, or ultrasonic waves? | infrasonic waves |
| A ship blows its horn. Some of the sound waves travel through the air and then hit the water. Will the sound waves travel faster in the water or in the air? | In the water |
| Sound waves are traveling through the air and suddenly run into a wall. As the sound waves travel through the wall, do they travel faster, slower, or at the same speed as when they were traveling in the air? Why? | Faster. Because the sound waves travel faster through the wall than through the air. |
| Why do jets travel at Mach 1 or higher only in sparsley populated regions? | Sonic boom can hurt human ears and buildings. |
| You hear two musical notes. They both have the same pitch, but the first is louder than the second. If you compare the sound waves of each sound, what aspect(s) of the wave (wavelength, frequency, speed, amplitude) would be the same? different? | Same: wavelength, frequency, speed Different: amplitude |
Created by:
LiseBrinkley
Popular Physical Science sets