radar wave is transmitted and later reflected off an aircraft and recieved 1.4×10^3 sec after being sent out. how far is the aircraft?​

Question

radar wave is transmitted and later reflected off an aircraft and recieved 1.4×10^3 sec after being sent out. how far is the aircraft?​

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Helga 3 years 2021-08-24T23:47:12+00:00 1 Answers 1 views 0

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  1. minhkhue
    0
    2021-08-24T23:48:16+00:00
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    I think there’s a typo because the answer I’m getting is very large.

    This is what I’m getting

    ————————————–

    c = speed of light

    c = 3.0 x 10^8 m/sec approximately

    This is roughly 300 million meters per second

    The time it takes the signal to reach the aircraft and come back is 1.4 x 10^3 seconds. Half of this time period is going one direction (say from the radar station to the aircraft), so (1.4 x 10^3)/2 = 7.0 x 10^2 seconds is spent going in this one direction.

    distance = rate*time

    d = r*t

    d = (3.0 x 10^8) * (7.0 x 10^2)

    d = (3.0*7.0) x (10^8*10^2)

    d = 21.0 x 10^(8+2)

    d = 21.0 x 10^10

    d = (2.1 x 10^1) * 10^10

    d = 2.1 x (10^1*10^10)

    d = 2.1 x 10^11 meters

    d = 210,000,000,000 meters (this is 210 billion meters; equivalent to roughly 130,487,950 miles)

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