Question
Give two uses of graphical representation of motion.
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Why do we hear the sound produced by the humming bees while the sound of vibrations of pendulum is not heard?
Explain why, snow shoes stop you from sinking into soft snow.
What was non-biodegradable substances?
Explain why, a wide steel belt is provided over the wheels of an army tank.

A wide steel belt is provided over the wheels of an army tank.
A sound wave has a frequency of 2kHz and wavelength 35cm. How long will it take to travel 1.5km?
What structures are involved in the formation of chromatin?