Physics, 03.12.2019 03:31, clairefc2019
Tennis balls traveling at greater than 100 mph routinely bounce off tennis rackets. at some sufficiently high speed, however, the ball will break through the strings and keep going. the racket is a potential-energy barrier whose height is the energy of the slowest string-breaking ball. suppose that a 100 g tennis ball traveling at 200 mph is just sufficient to break the 2.0-mm-thick strings. estimate the probability that a 120 mph ball will tunnel through the racket without breaking the strings. give your answer as a power of 10 rather than a power of e.
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How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit
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Tennis balls traveling at greater than 100 mph routinely bounce off tennis rackets. at some sufficie...
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