Question

(a) Determine the speed of sound in air at 25 degrees Celsius ( M=29(g)/(m)ol ). (b) A train whistle ( f=400Hz ) can be perceived as sounding higher or lower in pitch, depending on whether the train is approaching or receding. Show that the difference in frequency between the approaching and receding train whistle is Delta f=(2((v_(s))/(v)))/(1-((v_(s)^(2))/(v^(2)))), where v_(s) is the speed of the train (the source) and v is the speed of sound. (c) Calculate the difference for a train moving at a speed of 130k(m)/(h)r, assuming that the speed of sound in air is the one you found in (a). (d) Calculate the power of the whistle if its sound level is 100 decibels at 50.0m.(C) CALCULATE THE Difference FOR A TRAIN MOVINg at A SPEED OF 130km/hr assuming that the speed of sound in air is u=346.5(m)/(s)

          (a) Determine the speed of sound in air at 25 degrees Celsius ( M=29(g)/(m)ol ).
(b) A train whistle ( f=400Hz ) can be perceived as sounding higher or lower in pitch, depending on whether the train is approaching or receding. Show that the difference in frequency between the approaching and receding train whistle is Delta f=(2((v_(s))/(v)))/(1-((v_(s)^(2))/(v^(2)))), where v_(s) is the speed of the train (the source) and v is the speed of sound.
(c) Calculate the difference for a train moving at a speed of 130k(m)/(h)r, assuming that the speed of sound in air is the one you found in (a).
(d) Calculate the power of the whistle if its sound level is 100 decibels at 50.0m.(C) CALCULATE THE Difference FOR A TRAIN MOVINg at A SPEED OF 130km/hr assuming that the speed of sound in air is u=346.5(m)/(s)

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