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Unformatted text preview: benavides (jjb2356) – homework 34 – Turner – (59130) 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points A vertically pulsed laser fires a 1000 MW pulse of 180 ns duration at a small 10 mg pel- let at rest. The pulse hits the mass squarely in the center of its bottom side. The speed of light is 3 × 10 8 m / s and the acceleration of gravity is 9 . 8 m / s 2 . t h y T b b b b b b b b b b b b b b b b b b b b b b b b v T is the time to reach its maximum height h 10 mg 1000 MW 180 ns If the radiation is completely absorbed without other effects, what is the maximum height the mass reaches? Answer in units of μ m. 002 10.0 points A thin tungsten filament of length 1 . 59 m radiates 18 . 3 W of power in the form of elec- tromagnetic waves. A perfectly absorbing surface in the form of a hollow cylinder of radius 7 . 84 cm and length 1 . 59 m is placed concentrically with the filament. Assume: The radiation is emitted in the radial direction, and neglect end effects. The speed of light is 2 . 99792 × 10 8 m / s....
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This note was uploaded on 03/26/2012 for the course PHY 303L taught by Professor Turner during the Spring '08 term at University of Texas.
- Spring '08