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1. You are in a spaceship which is moving at 7.5 x 10 m/s (one-fourth the speed of light, 0.25c) away from a star. At what speed would the light from the star pass you? What if you were moving at the same speed towards the star? 2, Energy and mass are related by the formula E doughnut that weighs 150 g into energy how many joules of energy would be released? How long could this doughnut power New York City whose power usage averages about 10,000 Megawatts (1 Watt 1 Joule/second)? mc2. If you could convert all of the mass of a
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