Suppose a spacecraft of mass 17,000 kg is accelerated to 0.18c. How much kinetic energy would it have?
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A: The question can be solved as follows
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- A particle whizzes through your lab at a speed of 0.74c. Your detectors determine that its lifetime was 1.1ns. Find its lifetime in the particle's reference frame. Please give your answer in nanoseconds.12. (a) A particle is traveling through the Earth's atmosphere at a speed of 0.750c. To an earth bound observer, the distance it travels is 2.5km. How far does the particle travel in the particle's frame of reference? (b) Calculate the momentum of an electron traveling at a speed 0.985c? The rest mass of the electron is 9.11 X 10-31 kg.A high speed particle enters a medium and travels 7.1 mm before it decays. If the particle was travelling at 0.98c relative to the medium, what would the proper lifetime of the particle be? Give your answer in picoseconds (10-12 s) and don't give units.
- The mass of an electron at rest is 9.11*10-31 kg. Calculate its mass when it is moving at 0.15c.Astronomer David observes that a distant quasar is receding from the Earth at a speed of 0.80c. He also observes a not-as-distant galaxy to be receding from the Earth at a speed of 0.20c. How fast is the quasar receding in the frame of the galaxy? Express your answer as a fraction of c = 2.998 × 108 m/s.5. A rocket launched outward from Earth has a speed of 0.40c relative to the Earth. The rocket is directed toward an 0.70c relative to the rocket and directly incoming meteor that may hit the planet. If the meteor moves with a speed of toward it, what is the speed of the meteor as observed from Earth? с £60 ssfo ssf60 he 0 ssf60 of ssf60 ssie, sf60 ssf60ªssf