Question and answer
Which statement is true? A. The SI unit for the speed of light is hertz. B. Radio waves are a type of mechanical wave. C. The Doppler effect occurs with sound waves. D. Electromagnetic waves require molecules to travel.
The TRUE statement is: The Doppler effect occurs with sound waves.
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Asked 3/27/2013 10:37:31 AM
Updated 6/20/2014 8:36:17 AM
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The TRUE statement is: The Doppler effect occurs with sound waves.
Added 6/20/2014 8:36:17 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [6/20/2014 8:45:42 AM]
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Which device normally uses direct current electricity? A. flashlight B. computer C. television D. refrigerator
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Flashlight is a device normally uses direct current electricity.
Added 7/12/2016 2:53:40 AM
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