Physics
Two rods, one of copper and other of steel, experience the same upthrust when placed in water.Thus, both have

Equal weight
Equal volume
Equal density
Equal mass

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Physics
Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open

at a place in a valley below sea level
at sea level
in an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level
at the top of Mt. Everest

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