Physics class 9 Chapter 1

Length, mass, electric current, time, intensity of light and amount of substance are examples of

Plasma physics is the study of production, properties and applications of sound waves.

____________ is the study of properties of charges in rest and motion

The kilogram is not the SI unit of mass

______________ deals with the composition structure and properties of the atom

The S.I unit for density is kg/m³ kgm^-3.

The volume of 1 liter is equal to

This branch of physics is mainly concerned with the laws of motion and gravitation.

If zero line of Vernier scale coincides with zero of main scale, then zero error is

The study of ionized state of mater and its properties is known as Plasma Physics.

The three common phases or states of matter are solid, liquid and gas.

The number of base units in SI are__________.

All accurately known digits and first doubtful digit in an expression are known as

A worldwide system of measurements in which the units of base quantities were introduced is called

The base quantity is __________.