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Unformatted text preview: Correct answer: 9 . 702 10 8 W. Explanation: P = W t = mg h t = g h = (1 . 5 10 6 kg / s) (9 . 8 m / s 2 ) (66 m) = 9 . 702 10 8 W 003 10.0 points The fgure shows a potential energy curve For the interaction oF a two atom system. The horizontal line represents a bound state with constant K+U value. What is the minimum amount oF energy (in units oF eV) which must be supplied to cause the separation oF two atoms? (Caution: be careFul with the sign here.) 1. 0.9 2. 1.3 3.-0.2 4.-0.9 5.-1.2 6. 0.2 correct Version 046/AACDC QTest #8 Antoniewicz (56445) 2 Explanation: The minimum amount of energy needed is to bring the system from present state where E i = ( K + U ) i =-. 2 eV to the Fnal state where E f = ( K + U ) f = 0. The energy principle is E f-E i = W E = W = E f-E i = 0-(-. 2 eV) = 0 . 2 eV ....
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This note was uploaded on 11/17/2011 for the course PHY 303K taught by Professor Turner during the Fall '08 term at University of Texas at Austin.
- Fall '08