A bucket containing water of depth 15 cm is kept in a lift which is moving vertically upward with an acceleration 2g. Then the pressure on the bottom of the bucket in `kgwt//cm^(2)` is

A lift of mass 200 kg is moving upward with an acceleration of 3m//s^(2) . If g=10 m//s^(2) then the tension of string of the lift will be :

A beaker contains mercury to a depth of 4 cm and above it there is water of depth 12 cm. What is the total pressure acting on the bottom of the beaker? [density of mercury = 13.6g*cm^(-3) , atmospheric pressure = 76 cm of mercury]

A bucket containing water is tied to a rope of length 2.5 m and rotated in a vertical circle in wuch a way that the winter in it does not spill,what is the minimum velocity of the bucket at which this happens and how many rotations per minutes is it making then?(Take g=10 m s^(-2) ).