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Question
When it comes near a heavy nucleus, a gamma ray, which is a high energy photon, can "disappear," and in its place there will be produced an electron and a positron, which both have mass. According to special relativity, this pair production is an example of __________.Answer
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Related questions
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A wave moves in a rope with a certain wavelength. A second wave is made to move in the same rope with twice the wavelength of the first wave. The frequency of the second wave is half the frequency of the first wave.
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The wavelength of a wave divided by the frequency of the wave is the wave's speed.
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Q:
You listen to a live orchestra concert from a cheap seat far away, high up in the balcony. The music seems to be a little out of sync with the conductor's beat. Why?
a. The musicians are paying no attention to the conductor.
b. You are noticing a time lag due to the finite speed of sound.
c. The orchestra is not very good.
d. The viola section is dragging.
Q:
The wavelength of ultrasound at 1 million Hz in air where the speed of sound is 340 m/s is
a. 0.00000034 m
b. 0.0000034 m
c. 0.00034 m
d. 0.34 m
e. 340,000,000 m
Q:
Which of the following is not one of the ways sound can be used?
a. to circulate the refrigerant in a refrigerator
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When two identical waves arrive at the same place in phase, there is
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b. destructive interference
c. diffraction
d. a Doppler effect
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If the temperature of the air rises, the frequency you hear isa. the same as f b. higher than f c. lower than fd. unrelated to f
Q:
If you run towards the source, the frequency you hear isa. the same as f b. higher than f c. lower than fd. unrelated to f
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At temperatures below their boiling point, liquids gradually go into the gas phase through a process called
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Q:
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