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Unformatted text preview: n is an integer)? a) n + 1 2 ( ) ! . b) ( n + 1) . c) ( n + 1) 2 . d) n + 1 2 ( ) 2 3. Consider a wave on a string moving to the right as shown in the figure. What is the direction of the velocity of a particle at the point labeled A? a) To the right. b) To the right and up. c) Straight up. d) The particle is at rest. 4. The intensity of a sound wave emitted isotropically in all directions from a point-like source falls off with distance r like: a) 1/ r . b) 1/ r 2 . c) 1/ r 3 . A...
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- Fall '07