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A car moving at 20m/s is sounding its horn as it approaches you. If the actual frequency of the horn is 283 Hz, what frequency will you hear at 25.0 degrees C?

  • physics -

    F = ((V + Vr) / (V + Vs)) * Fo.

    F = ((343 + 0) / (343 + 20)) * 283,

    F = (343 / 363) * 283 = 267.4 Hz.

    V = Velocity of sound in air.

    Vr = Velocity of the receiver.

    Vs = Velocity of the source.

    Fo = Transmitted frequency of the source.

    F = Frequency received by the receiver.

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