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Unformatted text preview: m . What is the speed of the waves based on his estimates? 3) A bat ying in a cave emits a sound and receives its echo 0 . 2 s later. How far away is the cave wall? Use for the speed of sound, 340 m/s . 4) By what distance must two charges of +4 C be separated so that the repulsive force between them is 3 . 6 10 10 N Coulombs constant k = 9 10 9 Nm 2 /C 2...
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This note was uploaded on 10/20/2011 for the course PHY 309L taught by Professor Sai during the Spring '08 term at University of Texas at Austin.
- Spring '08