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A body experiences an upthrust of 20 N when completely submerged in water. If the same body is completely submerged in a liquid with twice the density of water, what is the new upthrust?
10 N
20 N
40 N
80 N
An object weighs 50 N in air and 40 N when fully submerged in water. What is the volume of the object? (Density of water = 1000 kg/m, g = 10 m/s)
0.001 m
0.005 m
0.01 m
0.1 m
Which of the following factors affects the pressure at a point inside a liquid?
Only depth of the liquid
Only density of the liquid
Both depth and density of the liquid
Neither depth nor density of the liquid
A tank filled with water has a small hole at a depth 'd' below the surface. The velocity of efflux is 'v'. If the water is replaced with a liquid of density twice that of water, the new velocity of efflux will be:
2v
v
v/2
4v
In which medium would an object reach a higher terminal velocity, assuming all other factors are equal: air or water?
Air
Water
They would be the same
It depends on the shape of the object
The capillary rise of a liquid in a tube depends upon:
Surface tension of the liquid
Radius of the capillary tube
Density of the liquid
All of the above
A sound wave travels through a medium with a bulk modulus and density . If the medium is suddenly compressed such that its density becomes while the temperature remains constant, what is the new speed of sound in the medium?
v
\sqrt{1.5}v
\frac{v}{\sqrt{1.5}}
1.5v
Two strings of identical material and length, but different radii r1 and r2 (r1 > r2), are subjected to the same tension. If a transverse wave is generated in both, the ratio of the speed of the wave in the thicker string to that in the thinner string is:
r1/r2
r2/r1
(r1/r2)^2
sqrt(r1/r2)
A non-conducting sphere of radius has a volume charge density , where is a constant and is the distance from the center. The electric field strength at is:
\frac{\rho_0 R}{6\epsilon_0}
\frac{5\rho_0 R}{48\epsilon_0}
\frac{\rho_0 R}{12\epsilon_0}
\frac{3\rho_0 R}{16\epsilon_0}
A wave travels along a string. If the tension in the string is doubled while the linear mass density remains constant, what happens to the speed of the wave?
Increases by a factor of 2
Increases by a factor of β2
Remains the same
Decreases by a factor of 2
