A liquid X of density 3.36 g/cm3 is poured in the right arm of a U-tube, which contains Hg. Another liquid Y is poured in left arm with height 8 cm, upper levels of X and Y are same. What is density of Y ?
0.8 g/cm3
1.2 g/cm3
1.4 g/cm3
1.6 g/cm3
A body floats in a liquid contained in a beaker. The whole system as shown in figure falls freely under gravity. The upthrust on the body is
zero
equal to the weight of the liquid displaced
equal to the weight of the body in air
equal to the weight of the immersed portion of the body.
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 :
Liquid rises to a height of 2 cm in a capillary tube. The angle of contact between solid and liquid is zero. The tube is depressed more now so that the tip of the capillary tube is only 1 cm above the liquid, the apparent angle of contact between solid and liquid is
0o
30o
60o
90o
The radii of two drops are in the ratio of 3 : 2, their terminal velocities are in the ratio
9 : 4
2 : 3
3 : 2
2 : 9
The ratio of the terminal velocities of two drops of radii R and R/2 is
2
1
1/2
4
From the following figures, the correct observation is
the pressure on the bottom of tank A is greater than that at the bottom of B
the pressure on the bottom of the tank A is smaller than that at the bottom of B
the pressure depends on the shape of the container
the pressure on the bottoms of A and B is the same.
Work done in increasing the size of a soap bubble from a radius of 3 cm to 5 cm is nearly (surface tension of soap solution = 0.03 Nm-1 )
4 mJ
0.2 mJ
2 mJ
0.4 mJ
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
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.