Which type of mechanical wave needs a source of energy to produce it?
A. a transverse wave
B. a longitudinal wave
C. a surface wave
D. all of the above
A. transverse waveAuto answered|Score .9246|Polio123|Points 177|User:
Which wave causes the medium to vibrate only in a direction parallel to the wave’s motion?
A. a transverse wave
B. a surface wave
C. a longitudinal wave
D. none of the above
B. transverse. Light is a transverse wave.Auto answered|Score .4646|eturker|Points 2439|User:
When a surfer rides an ocean wave on her surfboard, she is actually riding on
A. a crest that is toppling over.
B. a trough of the wave.
C. the rest position of the wave.
D. a region of rarefaction.
wave on her surfboard, she is actually riding on A.a crest that is toppling over B.a trough of the wave C.the rest position of the wave D.a region of [ rarefaction www.jiskha.com/search/index.cgi?query=How+much+heat+%28in+kilojoules%29+is+evolved+or+absorbed+in+the+reaction+of+1.40+g+of+Na+with+H2O%3F&page=33
] Auto answered|Score .8525User:
A wave has a wavelength of 10 mm and a frequency of 5.0 hertz. What is its speed?
A. 50 mm/s
B. 50 hertz/s
C. 2.0 mm/s
D. 0.50 mm/s
1/50Hz=0.02secondsAuto answered|Score .4595|Controler|Points 2413|User:
To what is amplitude related?
A. the amount of energy carried by the wave
B. the maximum displacement from the rest position
C. neither A nor B
D. both A and B
1. the amount of energy carried by the wave Auto answered|Score .8857|scijoe21|Points 1965|User:
Sonar equipment sends sound waves into deep water and measures
A. refraction of the transmitted wave.
B. only the direction of the reflected wave.
C. the time delay of the returning echoes.
D. interference of the transmitted and reflected waves.
C. the time delay of the returning echoes.Auto answered|Score .8931|Polio123|Points 177|User:
An ambulance siren sounds different as it approaches you than when it moves away from you. What scientific term would you use to explain how this happens?
D. the Doppler effect
D. the Doppler effect scientific term would you use to explain how An ambulance siren sounds different as it approaches you than when it moves away from you. [http://mrsoofi.wikispaces.com/8th+Grade+Study+Guide
]Auto answered|Score 1|jher000|Points 7504|User:
Which part of the ear amplifies the vibrations from sound waves?
A. outer ear
B. inner ear
C. middle ear
D. both a and b
The bones of the middle ear act as levers to amplify the vibrations of the sound waves. so 3. middle ear.
Auto answered|Score .593|jher000|Points 7504|User:
The part of the ear that sends coded nerve signals to the brain is
A. the outer ear.
B. the inner ear.
C. the middle ear.
D. the eardrum.
B. the inner ear. Auto answered|Score 1|abhik1100|Points 654|
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