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General
Easy
Question
For the flat surface discussed in the passage, the total torque of the hydrostatic force about point ‘O’ is
The correct answer is:
Related Questions to study
Physics-
A closed vessel is half filled with water. There is a hole near the top of the vessel and air is pumped out from this hole.
A closed vessel is half filled with water. There is a hole near the top of the vessel and air is pumped out from this hole.
Physics-General
Physics-
The vessel shown in the figure has two sections of areas of cross–section A1 and A2. A liquid of density r fills both the sections, up to a height h in each. Neglect atmospheric pressure
The vessel shown in the figure has two sections of areas of cross–section A1 and A2. A liquid of density r fills both the sections, up to a height h in each. Neglect atmospheric pressure
Physics-General
Physics-
A circular cylinder of radius R and height H is filled with water to a height 
H. It starts rotating about its axis with constantly increasing angular speed. Choose the correct alternatives
A circular cylinder of radius R and height H is filled with water to a height H. It starts rotating about its axis with constantly increasing angular speed. Choose the correct alternatives
Physics-General
Physics-
A Siphon tube is used to remove liquid from a container as shown in figure. In order to operate the Siphon tube it must initially be filled with the liquid
A Siphon tube is used to remove liquid from a container as shown in figure. In order to operate the Siphon tube it must initially be filled with the liquid
Physics-General
Physics-
The velocity of the water flowing from the inlet pipe is less than the velocity of water flowing out from the spin pipe B.
The velocity of the water flowing from the inlet pipe is less than the velocity of water flowing out from the spin pipe B.
Physics-General
Physics-
A small hole is made at a height of h¢ = (1/
) m from the bottom of a cylindrical water tank and at a depth of h = m from the upper level of water in the tank. The distance, where the water emerging from the hole strikes the ground is:
A small hole is made at a height of h¢ = (1/) m from the bottom of a cylindrical water tank and at a depth of h = m from the upper level of water in the tank. The distance, where the water emerging from the hole strikes the ground is:
Physics-General
Physics-
In the figure shown a liquid is flowing through a tube at the rate of 0.1 m3/sec. The tube is branched into two semi circular tubes of cross sectional area A/3 and 2A/3. The velocity of liquid at Q is (the cross-section of the main tube (A) = 10-2 m2 and VP = 20 m/sec.):
In the figure shown a liquid is flowing through a tube at the rate of 0.1 m3/sec. The tube is branched into two semi circular tubes of cross sectional area A/3 and 2A/3. The velocity of liquid at Q is (the cross-section of the main tube (A) = 10-2 m2 and VP = 20 m/sec.):
Physics-General
Physics-
In a hydraulic lift, used at a service station the radius of the large and small piston are in the ratio of 20 : 1. What weight placed on the small piston will be sufficient to lift a car of mass 1500kg?
In a hydraulic lift, used at a service station the radius of the large and small piston are in the ratio of 20 : 1. What weight placed on the small piston will be sufficient to lift a car of mass 1500kg?
Physics-General
Physics-
A piston of a syringe pushes a liquid with a speed of 1 cm/sec. The radii of the syringe tube and the needle are R = 1cm and r = 0.5 mm respectively. The velocity of the liquid coming out of the needle is:
A piston of a syringe pushes a liquid with a speed of 1 cm/sec. The radii of the syringe tube and the needle are R = 1cm and r = 0.5 mm respectively. The velocity of the liquid coming out of the needle is:
Physics-General
Physics-
A cube of mass m and density D is suspended from the point P by a spring of stiffness k. The system is kept inside a beaker filled with a liquid of density d. The elongation in the spring, assuming D > d, is:
A cube of mass m and density D is suspended from the point P by a spring of stiffness k. The system is kept inside a beaker filled with a liquid of density d. The elongation in the spring, assuming D > d, is:
Physics-General
Physics-
A particle of mass m (where m is the mass in gram) is released from point O with initial velocity zero. The work done by gravitational force on the particle, when it is taken from O to B, is
A particle of mass m (where m is the mass in gram) is released from point O with initial velocity zero. The work done by gravitational force on the particle, when it is taken from O to B, is
Physics-General
Physics-
Gravitational potential at the centre of curvature of a hemispherical bowl of radius R and mass M is V.
Gravitational potential at the centre of curvature of a hemispherical bowl of radius R and mass M is V.
Physics-General
Physics-
Inside a uniform sphere of mass M and radius R, a cavity of radius R/3 is made in the sphere as shown
Inside a uniform sphere of mass M and radius R, a cavity of radius R/3 is made in the sphere as shown
Physics-General
Physics-
A, B, C are vertices of an equilateral triangle imagined in free space (no gravity). First a mass m is brought from infinity to point A and the work done in doing so is WA. Then keeping m fixed at A, another identical mass m is brought from infinity to point B. The work done is WB. The work done by the another identical mass m brought from infinity to C is WC keeping A and B fixed. Then
A, B, C are vertices of an equilateral triangle imagined in free space (no gravity). First a mass m is brought from infinity to point A and the work done in doing so is WA. Then keeping m fixed at A, another identical mass m is brought from infinity to point B. The work done is WB. The work done by the another identical mass m brought from infinity to C is WC keeping A and B fixed. Then
Physics-General
Physics-
The ratio of earth’s orbital angular momentum (about the sun) to its mass is 4.4 × 1015 m2/s. The area enclosed by earth’s orbit is approximately
The ratio of earth’s orbital angular momentum (about the sun) to its mass is 4.4 × 1015 m2/s. The area enclosed by earth’s orbit is approximately
Physics-General
