Physics, 31.10.2020 01:00 coreyrineer2791
An observer is standing next to the tracks, watching a train approach. The train travels at 30 m/s and blows its whistle at 8,000 Hz as it approaches and then passes by the observer without slowing down. Assuming the speed of sound is 340 m/s, how much of a frequency change did the observer hear?
Answers: 2
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Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity
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The magnitude of the poynting vector of a planar electromagnetic wave has an average value of 0.939 w/m^2 . the wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. how much total electromagnetic energy falls on the area during 1.0 minute?
Answers: 2
An observer is standing next to the tracks, watching a train approach. The train travels at 30 m/s a...
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