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Paint gun depends upon?

Paint spray gun works on the principle of Bernoulli’s theorem. Bernoulli’s theorem states that the total mechanical energy of the... View Article

Which of the following cannot be explained on the basis of Bernoulli’s principle? (1) Lift on an aircraft’s wing (2) Ink filler (3) Swing of a cricket ball (4) Atomizer

Answer: (2) Ink filler Bernoulli’s principle Bernoulli’s principle states that the total mechanical energy of the moving fluid comprising the gravitational... View Article

Bernoulli’s theorem is applied to:

Bernoulli’s theorem is applied to incompressible liquid in streamlined flow.

To which type of fluid is the Bernoulli’s theorem applicable:

To which type of fluid is the Bernoulli’s theorem applicable incompressible, isotropic and non-viscous.

In the houses far away from the municipal water tanks often people find it difficult to get water on the top floor. This happens because

During the flow of water, a part of pressure energy is dissipated in doing work against friction.

Water is flowing through a horizontal pipe in streamline flow at the narrowest part of the pipe:

According to Bernoulli’s theorem P/ρ + ½v² + gh = Constant. Therefore, where v is maximum, P is minimum and... View Article

In which of the following types of flows is the Bernoulli’s theorem strictly applicable:

In streamline flow, the velocity of flow at any point in the liquid does not vary with time.

Water is flowing through a pipe under constant pressure. At some place the pipe becomes narrow. The pressure of water at this place:

According to Bernoulli’s theorem P/ρ + ½v² = Constant. At narrow end, velocity increases and hence pressure decreases.

When the velocity of liquids exceed the critical velocity then

When the velocity of liquids exceeds the critical velocity, then streamline flow becomes turbulent.

Blood is flowing at the rate of 200 cm3/s in a capillary of cross-section area 0.5 m2 . The velocity of flow is mm/s is

From the equation of continuity (av = constant), we have 0.5 V = 200 X 10-6 V = 4 X... View Article

The equation of continuity is a special case of the law of conservation of

For the pipe of varying cross-section, the mass of liquid flowing out equals the mass flowing in. This follows the... View Article

A body of mass m rises to a height h = R/5 from the earth’s surface where R is earth’s radius. If g is acceleration due to gravity , the increase in PE is

Increase in PE = mgR2 [ 1/R – 1/( R + h)] Put R = 5h Incr. in PE =... View Article

Range of Reynold’s number for the laminar flow of a liquid is

For laminar flow, Reynold’s number lies between zero to 1000.

Which of the following statement is not related to conservative force?

Path dependent force is a non-conservative force.

Frictional force is an example of

The frictional force is a non-conservative force. The non-conservative force depends on the path that is taken between the initial... View Article

A force which does not depend on the path taken to increase the potential energy is

A force which does not depend on the path taken to increase the potential energy is a conservative force. Frictional... View Article

In the streamlined flow of a liquid, the power due to pressure difference between the ends of the tube is (1) Equal to a product of pressure and volume of liquid flowing per second (2) Equal to a product of pressure and mass of liquid flowing per second (3) Equal to the product of radius and coefficient of viscosity (4) Equal to the product of pressure and velocity.

Answer: (1) Equal to a product of pressure and volume of liquid flowing per second Streamlined flow of a liquid Streamline... View Article

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