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Warm air is lighter than cold air.
Air expands on heating.
Smoke always rises up.
When warm air rises up, pressure in that region increases.
Pieces of camphor placed on water move about rapidly. This is because of
Pipelines in cold countries often burst in winter, because
Power from powerhouses is often transmitted as alternating current at 33000 volts or more. Why is power transmitted as such high voltage ?
Pressure Cooker cooks faster because
Pressure cooker cooks rice faster because
Primary rainbow is formed when light suffers
Product of Force and Velocity is called:
Propagation of light quanta may be described by
Propagation of sound can be visualised as propagation of _ variations in the medium
Proton carry a