Physics, 16.04.2020 21:35 mandilynn22
An echo is heard when sound is reflected off a surface. Which of the following best explains this phenomenon?
A. Sound waves strike a barrier and then spread out radially toward an observer.
B. Sound waves travel from one medium to another, bend, and travel back toward an observer.
C. Sound waves bounce off a barrier and then travel back toward an observer.
D. Sound waves are absorbed and reemitted by a barrier. Then, the waves travel back to an observer.
Answers: 3
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Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?
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An echo is heard when sound is reflected off a surface. Which of the following best explains this ph...
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