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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 electron’s 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 isn’t too important here. 2. No, because | v | c ....

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