A wooden block is taken to the bottom of a deep, calm lake of water and then released.  It rises up with a

A 20 cm long capillary tube is dipped in water.  The water rises up to 8 cm.  If the entire arrangement is put in a freely falling elevator the length of water column in the capillary tube will be

A sphere of mass m and radius r is falling in the column of a viscous fluid.  Terminal velocity attained by falling object is proportional to

A man is sitting in a boat, which is floating on a pond.  If the man drinks some water from the pond, the level of water in the pond.

Bernoulli's equation is an example of conservation of

Water from a tap emerges vertically downwards with an initial speed of 1.0 ms^-1 .  The cross-sectional area of the tap is 10^-4 m².  Assume that the pressure is constant throughout the stream of water, and that the flow is steady.  The cross-sectional area of the stream 0.15 m below the tap is

A water drop of radius R is split into n drops each of radius r.  If the surface tension of water be a, the energy required to split the drop is given by :

A glass tube of uniform internal radius (r) has a value separating the two identical ends.  Initially, the value is in a tightly closed position.  End 1 has a hemispherical soap bubble of radius r.  End 2 has sub-hemi-spherical soap bubbles as shown in figure.  Just after opening the valve,

A cylinder of height 20 m is completely filled with water.  The velocity of efflux of water (in ms^-1 ) through a small hole on the side wall of the cylinder near its bottom is