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29.06.2019 •
Physics
X-ray images of the sun generally show the
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Ответ:
Observed Frequency by Second Car = 739 Hz
Explanation:
Vs = 72km/h = 20m/s (Divide by 3.6)
Vo = 90km/h = 25m/s
f = 650[(350+25)/(350-20)]
f = 739 Hz
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