Floatation–Density and Relative Density | Class 9
DensityWe describe the lightness or heaviness of different substances by using the word density. The density of a substance is…
Floatation | Archimedes’ Principle & Buoyancy | Class 9
Pressure and Fluids All liquids and gases are called as fluids. A solid exerts pressure on a surface due to…
Floatation | Thrust and Pressure | Class 9
Thrust and PressureThe force acting on an object perpendicular to the surface is called thrust. That us understand the meaning…
Gravitation | Mass, Weight and Weightlessness | Class 9
MASSThe mass of a body is the quantity of matter contained in it. Mass is a scalar quantity. The unit…
Gravitation | Equation of Motion of freely falling Bodies | Class 9
Equation of Motion of freely falling BodiesWhen the bodies are falling under influence of gravity, they experience acceleration g i.e.…
Gravitation | Acceleration Due to Gravity | Class 9
Importance of the Universal Law of GravitationThe universal law of gravitation successfully explained several phenomena which were believed to be…
Gravitation | Introduction and Universal Law of Gravitation | Class 9
INTRODUCTIONWhen a body is held is hand and then released the body falls vertically downwards. Let us think as to…
Test Paper (Heron’s Formula) – Class –IX
Test Paper (Heron’s Formula) - Class –IXMaximum Marks: 251. The sides of a triangular plot are in the ratio of…
Scattering of Light | Human Eye and Colourful World
SCATTERING OF LIGHT Scattering of light means to throw light in various random directions. The scattering involves bouncing off of…
Atmospheric Refraction | Human Eye and Colourful World
Atmospheric Refraction The refraction of light caused by the earth's atmosphere is called atmospheric refraction. The physical conditions of the…