The SI unit of surface tension is
dyne/cm
N/m2
N/m
Nm
The property utilised in the manufacture of lead shots is
specific weight of liquid lead
specific gravity of liquid lead
compressibility of liquid lead
surface of tension of liquid lead
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 candle of diameter d is floating on a liquid in a cylindrical container of diameter D (D>>d) as shown in figure. If it is burning at the rate of 2 cm h-1, then the top of the candle will
remain at the same height
fall at the rate of 1 cm h-1
fall at the rate of 2 cm h-1
go up at the rate of 1 cm h-1
A liquid is kept in a cylindrical vessel which is being rotated about a vertical axis through the centre of the circular base. If the radius of the vessel is r and angular velocity of rotation is ω, then the difference in the heights of the liquid at the centre of the vessel and the edge is
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
10
20
25.5
5
Extra pressure inside a soap bubble of radius (r) is proportional to
r
1 / r
r2
1 / r2
The surface tension of liquid decreases with a rise in
temperature of the liquid
viscosity of the liquid
diameter of container
thickness of container
In old age arteries carrying blood in the human body become narrow resulting in an increase in the blood pressure. This follows from
Pascal's law
Stoke's law
Bernoull's principle
Archimedes' principle
A 15 cm x 6 cm x 0.1 cm slide suspended with its longest side vertical. 10% part of this slide is dipped into the water. In this state its apparent weight is equal to its real weight. The surface tension of water will be :
72.3 N/m
723 N/m
