How fast is the rock star moving relative to the earth

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Q. An intergalactic rock star bangs his drum every 1.30s. A person on earth measures that the time between beats is 2.30s. How fast is the rock star moving relative to the earth?

Q. A steel ball with radius 1 cm is rolling along a table with speed 20.00 cm/sec when it starts to roll up an incline. How high above the table level would it rise before stopping?

Reference no: EM1385055

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