HSC Science इयत्ता ११ - Tamil Nadu Board of Secondary Education Question Bank Solutions

In a horizontal pipe of non-uniform cross-section, water flows with a velocity of 1 ms⁻¹ at a point where the diameter of the pipe is 20 cm. The velocity of water (1.5 ms⁻¹) at a point where the diameter of the pipe is (in cm)

Define the coefficient of viscosity of a liquid.

Distinguish between streamlined flow and turbulent flow.

What is Reynold’s number? Give its significance.

Define terminal velocity.

Write down the expression for Stoke’s force and explain the symbols involved in it.

Two streamlines cannot cross each other. Why?

Derive the expression for the terminal velocity of a sphere moving in a high viscous fluid using stokes force.

Derive Poiseuille’s formula for the volume of a liquid flowing per second through a pipe under streamlined flow.

A block of Ag of mass x kg hanging from a string is immersed in a liquid of relative density 0.72. If the relative density of Ag is 10 and tension in the string is 37.12 N then compute the mass of Ag block.

Why two holes are made to empty an oil tin?

An ideal gas passes from one equilibrium state (P₁, V₁, T₁, N) to another equilibrium state (2P₁, 3V₁, T₂, N). Then

A hot cup of coffee is kept on the table. After some time it attains a thermal equilibrium with the surroundings. By considering the air molecules in the room as a thermodynamic system, which of the following is true

Identify the state variables given here?

What is a thermodynamic system? Give examples.

What are the different types of thermodynamic systems?

What is meant by ‘thermal equilibrium’?

What is mean by state variable? Give example.

What are intensive and extensive variables? Give examples.

What is an equation of state? Give an example.