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Q. Television sets sometimes use a rabbit ears antenna to the right. A rabbit-ears antenna consists of a pair of metal rods. The length of each rod can be adjusted to one quarter of a wavelength of an electromagnetic wave whos frequency is 125 Mhz. How long is each rod.

Q. A 26-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 210 J from 430 J. How high does she rise during this interval? Neglect air resistance.

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Category:- Physics
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