Practice HW 3

# Practice HW 3 - lim(kl9356 Practice HW 3 Weathers(22202...

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lim (kl9356) – Practice HW 3 – Weathers – (22202) 1 This print-out should have 13 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 3) 10.0 points A proton has an initial velocity of 1 . 51 × 10 7 m / s in the horizontal direction. It enters a uniform electric field of 16400 N / C directed vertically. Ignoring gravitational effects, find the time it takes the proton to travel 0 . 119 m horizon- tally. Answer in units of ns. 002 (part 2 of 3) 10.0 points What is the vertical displacement of the pro- ton after the electric field acts on it for that time? Answer in units of mm. 003 (part 3 of 3) 10.0 points What is the proton’s speed after being in the electric field for that time? Answer in units of km / s. 004 10.0 points The electron gun in a television tube is used to accelerate electrons (mass of 9 . 10939 × 10 31 kg and charge of - 1 . 60218 × 10 19 C) from rest to 3 × 10 7 m / s within a distance of 3 . 1 cm.

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