An intergalactic rock star bangs his drum every 110 s a
An intergalactic rock star bangs his drum every 1.10 s. A person on earth measures that the time between beats is 2.10 s. How fast is the rock star moving relative to the earth?
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an intergalactic rock star bangs his drum every 110 s a person on earth measures that the time between beats is 210 s
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