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Need help with physics problem

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Kirk saw the space shuttle take off from it launch pad. Heard the ignition blast 15 seconds later. The frequency of the sound wave produced by the engine blast was 2000 Hz. Assume the speed of sound on that day was 340 meters per second.

a) Find the distance in kilometers that Kirk was from the launch pad.

b) What was the wavelength in meters of the sound wave produced by the engine blast.
 Aug 28, 2013

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 #1
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In this case you can easily count the meters, by multiplying the time it took by the speed of the sound. Here it is also already in m/s and seconds, so you simply multiply 15*340 and you get the output of 5100m. And you wanted your answer in km, which is 5.1km The soundwaves I cant help you with atm, sorry!
 Aug 28, 2013
 #2
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Wavelength = c/f = (340 m/s)/(2000 Hz) = (340 m/s)/(2000 1/s) = (340 m)/(2000) = 0,170 m
 Aug 28, 2013

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