A railway-line testing team checking a continuous rail of length 250 m. One tester strikes one end of the rail with a hammer. The other tester hears the sound transmitted through the air and transmitted through the rail. He hears the two sounds at different times. [The speed of sound in steel is 5000 m/s and in the air is 330m/s. a) Calculate the time difference.
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A railway-line testing team checking a continuous rail of length 250 m. One tester strikes one end o...
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