Explain why the raindrops are spherical?
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A girl carries 20 litres in a Jerry can on her head and walks for 200 metres on a horizontal level ground. Explain why the girl does no work (Assume air resistance is negligible).
It is observed that a vehicle which has a door at the rear side gathers more dust inside when moving at high speed on a dusty road with the door open than the one which has an open door on ...
State and explain factors that affect capacitance of parallel-plate capacitor.
The control grid in a cathode ray oscilloscope (CRO) is used to control the brightness of the beam on the screen. Explain how this is achieved.