A frame-by-frame analysis of slow-motion video shows that a hovering dragonfly takes 7 frames to complete one

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A frame-by-frame analysis of slow-motion video shows that a hovering dragonfly takes 7 frames to complete one wing beat. If the video is shot at 240 frames per second,
(a) What is the period of the wing beat,
(b) How many wing beats does the dragonfly perform per second?
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Physics

ISBN: 978-0321976444

5th edition

Authors: James S. Walker

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