An object is moving through the liquid. The viscous damping force acting on its is proportional to the velocity. Then dimensions of constant of proportionality are
[ ML-1 T--1 ]
[ MLT--1 ]
[ ML0 LT-1 ]
[ ML0 T--1 ]
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
Drops of liquid of density are floating half immersed in a liquid of density . If the surface tension of the liquid is T, then the radius of drop will be :
A hemispherical portion of radius R is removed from the bottom of a cylinder of radius R. The volume of the remaining cylinder is V and mass M. It is suspended by a string in a liquid of density , where it stays vertical. The upper surface of the cylinder is at a depth h below the liquid surface. The force on the bottom of the cylinder by the liquid is
Mg
When the temperature is increased, the angle of contact of a liquid
increases
decreases
remains the same
first increases and then decreases
A spherical drop of water has 1 mm radius. If the surface tension of water is 70 ×10-3 Nm-1, then difference of pressure between inside and outside of the spherical drop is
35 Nm-2
70 Nm-2
140 Nm-2
zero
A capillary tube when immersed vertically in a liquid records a rise of 3.0 cm. If the tube is half immersed in the liquid at an angle of 60o with the vertical, the length of the liquid column along the tube will be :
1.5 cm
3.0 cm
6.0 cm
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
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
Motion of a liquid in a tube is best described by
Bernoulli' theorem
Poiseuille's equation
Stokes' law
Archimedes' principle
