4. According to the Doppler effect, light from a star moving away from Earth will have a higher frequency than light from a star moving toward Earth.
5. When two waves are in the same place at the same time, they combine to produce a single wave.
6. Anything that moves up and down or back and forth in a rhythmic way is vibrating.
7. Sound waves A.require a medium. C.are not mechanical waves. B.are unrelated to vibrations. D.can travel in a vacuum.
8. The medium seismic waves travel through is A.a vacuum. C.air. B.rocks and other materials inside Earth. D.energy.
9. Sound waves are an example of A.transverse waves. C.circular waves. B.longitudinal waves. D.polarized waves.
10. Light waves are an example of A.transverse waves. C.rotating waves. B.longitudinal waves. D.circular waves.
11. A person is standing still and listening to a siren sounding an alarm. The person begins running toward the sound. The frequency of the sound the person hears will A.remain the same. C.decrease. B.increase. D.change by 20 Hz.
12. The frequency of a sound wave determines A.the pitch of the sound. C.how fast the sound travels. B.how loud the sound is. D.the magnitude of the compression.
13. How loud a sound is depends on A.the wavelength of the sound. C.the amplitude of the waves. B.the pitch of the sound. D.the medium.
14. The intensity of a sound describes A.its speed. B.its loudness at a particular distance. C.the distance and medium through which it travels D.the medium through which it travels.
15. The pitch of a sound is most closely related to the A.frequency of vibrations. B.distance from the sound source. C.medium through which the sound travels. D.intensity of the sound.
16. A change in pitch or wave frequency due to movement is known as _____________. A.ultrasonic waves C.Doppler Effect B.intensity D.vibrations
17. A sound wave consists of _______________. A.compressions and rarefactions C.both a and b B.crests and troughs D.neither a nor b
18. Mechanical waves are different than electromagnetic waves due to the fact that A.electromagnetic waves do not need a medium to transport energy. B.mechanical waves do not need a medium to transport energy. C.electromagnetic waves are influenced by light. D.mechanical waves only transport energy in outerspace.
19. Which demonstration was used to illustrate the relationship between wavelength and pitch? A.oven rack and string C.can phone B.talking cups D.carpet tubes and bunsen burner
20. Which demonstration was used to illustrate the effect of vibrations on a medium? A.oven racks and string C.can phone B.tuning forks D.all of the above
21. The vacuum pump and alarm clock were used to illustrate the effect of _____ on sound waves. A.pitch C.frequency B.medium D.vibrations
21. A wave that causes the particles of the medium to vibrate perpendicularly to the direction the wave travels. 22. A wave that requires a medium through which to travel. 23. A wave that causes the particles of the medium to vibrate parallel to the direction the wave travels. 24. A wave caused by a disturbance in electric and magnetic fields that does not require a medium.
25. Two or more waves in the same place at the same time. 26. A disturbance that transmits energy through matter or space. 27. The time required for a full wavelength to pass a certain point. 28. The number of vibrations that occur in a certain time frame. 29. The matter through which a wave travels.
Can you label a transverse wave? Can you label a longitudinal wave? Can you find the Wavelength, frequency, period and speed of a wave?
Cicadas produce a buzzing sound that has a wavelength of 2.69m. If the speed of sound in air is 346m/s, what is the frequency of the sound produced? Remember…f = v λ
. The frequency of a wave travelling a speed of 500 m/s is 25 Hz. Its time period will be ____. a. 20 sc. 25 s b..05 sd..04 s
The frequency which is not audible to the human ear is a. 50 Hzc. 5000Hz b. 500 Hzd. 50000Hz
The speed of sound in medium depends upon a. Amplitudec. wavelength b. Frequencyd. properties of the medium
The vibrations or the pressure variations inside the inner ear are converted into electrical signals by the a. cochleac. pinna b. tympanic membraned. anvil
Sounds having a frequency of 20 Hertz or less are a. infrasonicc. supersonic b. sonicd. ultrasonic
The characteristic of sound which distinguishes a loud sound from a muffled sound of the same frequency is ____. a. pitchc. decibel level b. quality d. none of these
. How do rock particles move during the passage of a P wave through the rock? a. back and forth parallel to the direction of the wave travel b. back and forth perpendicular to the direction of the wave travel c. in a rolling circular motion d. the particles do not move
It is possible to break a wine glass by singing very loudly at the right note. This phenomenon when two objects vibrate at the same frequency is called A. diffraction. C. refraction. B. interference.D. resonance
You hear a plane 4 seconds after you see it. Find the distance to the plane. (speed of sound in air = 340 m/s) a. 85 mc. 136m b..01 kmd. 1360 m
If a sound wave’s frequency is 100 Hz. What is its period? a..01 secb..1 sec c. 100 secc. 1 sec
A railroad crew is repairing a rail. You hear the hammer 0.5 seconds after it is swung. How far away is the crew? (Speed of sound in air= 340 m/s) a. 170 mc. 680 m b. 170 kmd. 680 km