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General
Easy
Question
Water flows through a frictionless duct with a cross-section varying as shown in figure. Pressure p at points along the axis is represented by
The correct answer is:
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physics-
A tube is attached as shown in closed vessel containing water. The velocity of water coming out from a small hole is :
A tube is attached as shown in closed vessel containing water. The velocity of water coming out from a small hole is :
physics-General
physics-
A cubical box of wine has a small spout located in one of the bottom corners. When the box is full and placed on a level surface, opening the spout results in a flow of wine with a initial speed of 
(see figure). When the box is half empty, someone tilts it at 45° so that the spout is at the lowest point (see figure). When the spout is opened the wine will flow out with a speed of
A cubical box of wine has a small spout located in one of the bottom corners. When the box is full and placed on a level surface, opening the spout results in a flow of wine with a initial speed of (see figure). When the box is half empty, someone tilts it at 45° so that the spout is at the lowest point (see figure). When the spout is opened the wine will flow out with a speed of
physics-General
physics-
A jet of water with cross section of 6 
strikes a wall at an angle of 60° to the normal and rebounds elastically from the wall without losing energy. If the velocity of the water in the jet is 12 m/s, the force acting on the wall is
A jet of water with cross section of 6 strikes a wall at an angle of 60° to the normal and rebounds elastically from the wall without losing energy. If the velocity of the water in the jet is 12 m/s, the force acting on the wall is
physics-General
physics-
A cylindrical block of area of cross–section A and of material of density 
is placed in a liquid of density one–third of density of block. The block compresses a spring and compression in the spring is one–third of the length of the block. If acceleration due to gravity is g, the spring constant of the spring is:
A cylindrical block of area of cross–section A and of material of density is placed in a liquid of density one–third of density of block. The block compresses a spring and compression in the spring is one–third of the length of the block. If acceleration due to gravity is g, the spring constant of the spring is:
physics-General
physics-
There is a metal cube inside a block of ice which is floating on the surface of water. The ice melts completely and metal falls in the water. Water level in the container
There is a metal cube inside a block of ice which is floating on the surface of water. The ice melts completely and metal falls in the water. Water level in the container
physics-General
physics-
A body having volume V and density r is attached to the bottom of a container as shown. Density of the liquid is d(>r). Container has a constant upward acceleration a. Tension in the string is
A body having volume V and density r is attached to the bottom of a container as shown. Density of the liquid is d(>r). Container has a constant upward acceleration a. Tension in the string is
physics-General
physics-
A metal ball of density 7800 
is suspected to have a large number of cavities It weighs 9.8 kg when weighed directly on a balance and 1.5 kg less when immersed in water . The fraction by volume of the cavities in the metal ball is approximately:
A metal ball of density 7800 is suspected to have a large number of cavities It weighs 9.8 kg when weighed directly on a balance and 1.5 kg less when immersed in water . The fraction by volume of the cavities in the metal ball is approximately:
physics-General
physics-
Choose the correct statement
Choose the correct statement
physics-General
physics-
A quick judgement about a measurement of some particular quantity is called
A quick judgement about a measurement of some particular quantity is called
physics-General
physics-
An instrument used for seeing distant objects is called
An instrument used for seeing distant objects is called
physics-General
physics-
The phenomena which are taking place in matter and energy are studied in
The phenomena which are taking place in matter and energy are studied in
physics-General
physics-
Calculate the potential energy if mass and height are 500g and 2m respectively. (g = 10 m/s2)
Calculate the potential energy if mass and height are 500g and 2m respectively. (g = 10 m/s2)
physics-General
physics-
In case of electric train ............. energy converts into ....................... energy.
In case of electric train ............. energy converts into ....................... energy.
physics-General
physics-
Work is converted into ...............
Work is converted into ...............
physics-General
physics-
Solar cell converts .............. energy into .................. energy.
Solar cell converts .............. energy into .................. energy.
physics-General
