A spaceship passes you at a speed of 0. 868c. You measure its length to be 49. 0

Question

A spaceship passes you at a speed of 0. 868c. You measure its length to be 49. 0m. How long would it be when at rest? Answer: Submit All Answers What is the speed of a beam of points if their average lifetime is measured to be 4. 18xl0-8s? At rest, their lifetime is 2. 60x10-8s. Answer: Submit All Answers At what speed will an object's mass be four times its rest mass? Answer: Submit All Answers What is the kinetic energy of an electron whose mass is 3. 43 times its rest mass? Answer: Submit All Answers How much work is required to accelerate a proton from rest up to a speed of 0. 992c? Answer: Submit All Answers

Explanation / Answer

13 is 98.678 m. You need to multiply by gamma, not divide. 14 is 0.783c 15 is 0.968c

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