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6 November, 22:03

An airplane is flying at Mach 1.48 at an altitude of 7,800.00 meters, where the speed of sound is v = 311.83 m/s. How far away from a stationary observer will the plane be when the observer hears the sonic boom? (Enter the total distance in m.)

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  1. 7 November, 00:53
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    The plane will be 11545.46 m far when the observer hears the sonic boom

    Explanation:

    Step 1: Data given

    Altitude of the plane = 7800 meters

    speed of sound = 311.83 m/s

    Step 2:

    The mach number M = vs/v

    This means v/vs = 1/M

    Half - angle = ∅

    sin∅ = v/vs

    ∅ = sin^-1 (v/vs)

    ∅ = sin^-1 (1/M)

    ∅ = sin^-1 (1/1.48)

    ∅ = 42.5 °

    tan ∅ = h/x

    ⇒ with h = the altitude of the plane = 7800 meter

    ⇒ with x = the horizontal distance moved by the plane

    x = h/tan ∅

    x = 7800 / tan 42.5

    x = 8512.2 meters

    d = the distance between the observer and the plane when the observer hears the sonic boom is:

    d = √ (8512.2² + 7800²)

    d = 11545.46 m

    The plane will be 11545.46 m far when the observer hears the sonic boom
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