nathaliapachon1254
08.02.2021 •
Physics
Two train whistles have identical frequencies of 1.86 102 Hz. When one train is at rest in the station and the other is moving nearby, a commuter standing on the station platform hears beats with a frequency of 8.00 beats/s when the whistles operate together. What are the two possible speeds that the moving train can have
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Ответ:
First Bar- 1cm and 10 mm
Second Bar- 9cm and 90 mm
Third Bar- 4cm and 40mm
Fourth Bar- 6cm and 60mm
Explanation:
There are 10 millimeters in each centimeter, to find the centimeters you just count the number of big lines the bar goes through, and multiply that number by 10 to find the millimeters.
hope this helps!