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Contrast the speeds of sound and light in watching a flash of lightning, then listening for thethunder to follow.
Q22: What did Galileo discover about Jupiter that
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Q46: If Taurus is now rising at sunset,which
Q51: Describe at least three advantages of CCD
Q53: An X-ray photon has more energy than
Q56: The observed spectral lines of a star
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Q96: Which of the following is a problem