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Mathematics 7 Online
OpenStudy (skullcandy229):

A train traveling 80 kph is blowing its horn as it approaches a railroad crossing. The horn has a frequency of 300 Hz. Assume the speed of sound is 331 m/sec. What is the observed frequency of the horn? (Round to the nearest whole number.)

OpenStudy (skullcandy229):

350 302 395 322 are one of these right

OpenStudy (fantageplayer):

wow i have no idea at all

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