GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Jacob holds a rubber band. What could Jacob do to make a sound with the rubber band?
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blow on it
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make it longer
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make it shorter
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pull and let go
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Explanation:
Detailed explanation-1: -When it is tighter, it can only move a short distance back and forth, which makes a higher pitched sound. But when the rubber band is looser, it can move a much greater distance back and forth, which makes a much lower pitched sound.
Detailed explanation-2: -When you pluck the rubber band, you make it vibrate. The rubber band in turn pushes on the nearby air, making it vibrate. Even though you can’t see the air vibrating, your ear can hear it. The vibration causes the sound.
There is 1 question to complete.