Ch6-HW1-problems - saliyev (is4663) Ch6-HW1 haley (56465) 1...

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Unformatted text preview: saliyev (is4663) Ch6-HW1 haley (56465) 1 This print-out should have 21 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 (part 1 of 3) 4.0 points An electron has mass 9 . 1 10- 31 kg. The speed of light is 3 10 8 m / s. If the electrons speed is 0 . 993 c (that is, v/c = 0 . 993), what is its particle energy? Answer in units of J 002 (part 2 of 3) 3.0 points What is its rest energy? Answer in units of J 003 (part 3 of 3) 3.0 points What is its kinetic energy? Answer in units of J 004 (part 1 of 4) 3.0 points The point of this question is to compare rest energy E r and kinetic energy KE at low speeds. A baseball is moving at a speed of 15 m / s. Its mass is 159 g (0 . 159 kg). The speed of light is 3 10 8 m / s. What is its rest energy? Answer in units of J 005 (part 2 of 4) 3.0 points Is it okay to calculate its kinetic energy using the formula 1 2 mv 2 ? 1. Yes, because accuracy isnt too important here. 2. No, because | v | c ....
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This note was uploaded on 02/21/2012 for the course M 408d taught by Professor Sadler during the Fall '07 term at University of Texas at Austin.

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Ch6-HW1-problems - saliyev (is4663) Ch6-HW1 haley (56465) 1...

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