PHYSICS 9TH
PHYSICS 9TH - Short / Detailed Question Answers
THERMAL PROPERTIES OF MATTER
CHAPTER # 09
Q.1: Define heat. What is its unit?
Ans:
Heat:
Heat is a form of energy that transfers from a hot body to a cold body as a result of the difference in temperature between them.
Unit of Heat:
As heat is a form of energy, its S.I unit is joule. Its other unit is a calorie.
PHYSICS 9TH
PHYSICS 9TH - Short / Detailed Question Answers
ENERGY SOURCES AND TRANSFER OF ENERGY
CHAPTER # 08
Q.1: Define force.
Ans:
Force is an agent which tends to change the state of an object.
Q.1: Define matter.
Ans: Anything which occupies space and having mass is called matter.
Q.2: How many states of matter are there?
Ans: There are three states of matter. These states are solid, liquid, and gas. All the material objects around us belong to any one of these states.
