A wooden stick 2 m long is floating on the surface of water. The surface tension of water is 0.07 Nm-1 . By putting soap solution on one side of the stick, the surface tension is reduced to 0.06 Nm-1 . The net force on the stick will be :
0.01 N
0.02 N
0.06 N
0.07 N
The most characteristic property of a liquid is
elasticity
fluidity
formlessness
volume conservation
Scent sprayer is based on
Charles' law
Boyle's law
Archimedes' principle
Bernoulli's theorem
The rate of flow of water in a capillary tube of length l and radius r is V. The rate of flow in another capillary tube of length 2l and radius 2 r for same pressure difference would be
16 V
9 V
8 V
2 V
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.
decreases
increases
remains unchanged
may increase or decrease depending on the weight of the man.
One large soap bubble of diameter D breakes into 27 bubbles having surface tension T. The change in surface energy is
A body is floating in a liquid. The upthrust on the body is
zero
equal to the weight of liquid displaced
less than the weight of liquid displaced
weight of body-weight of liquid displaced
Water is filled up to a height h in a beaker of radius R as shown in the figure. The density of water is , the surface tension of water is T and the atmospheric pressure is P0 . Consider a vertical section ABCD of the water column through a diameter of the beaker. The force on water on one side of this section by water on the other side of this section has magnitude.
A water fountain on the ground sprinkles water all around it. If the speed of water coming out of the fountain is v, the total area around the fountain that gets wet is
