Physics, 08.08.2019 11:10 girlchamp654
In which of the following conditions would a person not hear an echo? a. a sound wave reaches the ear, and the reflected wave reaches the ear less than 0.1 seconds later, b. a person is standing in the range of the sound waves coming from the original sound sources as well as the reflected waves, c. the reflecting wave source is approximately 21.5 meters from the person, d. a person is standing 30 meters in front of the reflecting surface.
Answers: 3
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A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?
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In which of the following conditions would a person not hear an echo? a. a sound wave reaches the e...
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