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January 30, 2015

January 30, 2015

Posted by **Becca** on Sunday, October 4, 2009 at 1:35pm.

- Physics -
**MathMate**, Sunday, October 4, 2009 at 2:51pmLet the plane be H m above the observer.

Time taken for sound to reach observer, t

= H/330 s

Distance plane travelled in time t, D

=H sin(30°) m

Speed of plane

= distance / t

= D/t

= H sin(30°) / (H/330) m/s

= 330 sin(30°) m/s

Convert to km/h if necessary (multiply by 3.6).

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