Physics
What is found in frequency modulation ?

Fixed dimension
Change in dimension only
Change in frequency and dimension
Fixed frequency

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Physics
A cyclist leans inwards when he is negotiating a curve so that

Necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion.
He may increase his speed
His weight may be reduced
No frictional force may be produced between the wheels and the axle

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