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A jet is flying horizontally, as the drawing shows. When the plane is directly overhead at B , a person on the ground hears the

A jet is flying horizontally, as the drawing shows. When the plane is directly overhead at B, a person on the ground hears the sound coming from A in the drawing. The average temperature of the air is 20 oC. If the speed of the plane at A is 173 m/s, what is its speed at B, assuming that it has a constant acceleration?

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