### Saturated and Unsaturated Vapour Pressure

Saturated and Unsaturated Vapour Pressure What is a saturated solution? If in a water sugar solution, the amount of dissolved sugar is equal to the maximum amount that a given amount of water can dissolve at a certain temperature, then that solution is called a saturated solution. What is an unsaturated solution? If in a water sugar solution, the amount of dissolved sugar is less than that amount that a given amount of water can dissolve at a certain temperature, then that solution is called a saturated solution. What is saturated vapour? At a certain temperature in an enclosed space, if the amount of vapour present is equal to the maximum vapour capacity of that space, then that vapour is called saturated vapour. What is unsaturated vapour? At a certain temperature in an enclosed space, if the amount of vapour present is less than the maximum vapour capacity of that space, then that vapour is called unsaturated vapour. What is vapour pressure? Vapour enclosed in a container behaves

## 👉All Chapter Contents👈

• 3.1 Inertia of Concept of Force - Newton's First Law
• 3.2 Nature of Fundamental Forces
• 3.3 Balanced and Unbalanced Forces
• 3.4 Momentum
• 3.5 Collision
• 3.6 Effect of Force on Motion: Newton's Second Law
• 3.7 Gravitational Force
• 3.8 Newton's Third Law
• 3.9 Frictional Force

## 3.1 Inertia of Concept of Force - Newton's First Law (adsbygoogle = window.adsbygoogle || []).push({});

• State Newton's first law.
• Explain why we never observe that a body in motion keeps its perpetual motion forever?
• What does inertia mean?
• What is inertia of rest?
• What is inertia of motion?
• Mass is the measurement of inertia? Explain.
• What is force?
• What is contact force?
• What is a non-contact force?
• Explain that the concept of inertia is found from Newton's first law.
• Which way does passenger lean when the moving bus suddenly breaks and why?

• What is fundamental force?
• How many fundamental forces in nature and what are they?
• What do you mean by gravity?
• What do you mean by electromagnetic force?
• What do you mean by weak nuclear force?
• What do you mean by strong nuclear force?
• Discuss the comparative intensity of the fundamental forces.

## 3.3 Balanced and Unbalanced Forces

• What do you mean by balanced force?
• What do you mean by unbalanced force?

• What is momentum?
• Determine the unit and dimension of momentum.
• What do you understand by momentum 200 kgm/s?
• Write the law of conservation of momentum.

## 3.5 Collision

• Write the law of conservation of momentum?
• Prove the law of conservation of momentum.
• Write the law of conservation of energy?
• Show that before the collision and after the collision total momentum is equal.
• Explain the necessity of force and motion in the case of safe journey.

## (adsbygoogle = window.adsbygoogle || []).push({}); 3.6 Effect of Force on Motion: Newton's Second Law

• Write the second law of Newton.
• Prove that, F = ma.
• Write the unit and dimension of force.

## 3.7 Gravitational Force

• What is gravitational force?
• What is the value of the gravitational constant 'G'?

• Write Newton's third law.
• Explain Newton's third law.

## 3.9 Frictional Force

• What is friction?
• What is frictional force?
• Explain the origin of friction.
• How many types of friction and what are they?
• What is static friction?
• What is sliding friction?
• What is rolling friction?
• What is fluid friction?
• Explain the effect of friction on the motion?
• Why there is a groove on the surface of the car tire?
• Explain how friction can be reduced?
• Explain how friction can be increased?
• Explain why friction is a necessary evil?

# Secondary Physics

## Mathematical Problems

• What is the force to be applied to a mass of 50 kg to produce an acceleration of 4 ms-2? [Ans: 200 N]

• A boy pushes a box of mass 20 kg with a force of 50 N. What will be the acceleration of the box? [Ans: 2.5 ms-2]

• A force of 2000 N acts on a body of mass 20 kg for a time of 0.1 s. What is the change of momentum of the body? [Ans: 200 kgms-1]

• A bullet of mass 10 g was shot from a gun with a velocity of 500 ms-1. If the mass of the gun is 2 kg, find the backward velocity of the gun. [Ans: 2.5 ms-1]