Every object in the universe attracts every other object with a force which is called the force of gravitation. Gravitation is one of the four classes of interactions found in nature. These are (i) the gravitational force (ii)...

Wave A wave is a vibratory disturbance in a medium which carries energy from one point to another point without any actual movement of the medium. There are three types of waves Mechanical Waves Those waves which require a material medium...

Periodic Motion A motion which repeats itself identically after a fixed interval of time is called periodic motion. e.g., orbital motion of the earth around the sun, motion of arms of a clock, motion of a simple pendulum etc. Oscillatory...

Methods of Heat Transmission There are three methods of heat transmission (i) Conduction In solids, heat is transmitted from temperature to lower temperature without actual movements the particles. This mode of transmission of heat....

The branch of physics which deals with the study of transformation of heat energy into other forms of energy and vice-versa. A thermodynamical system is said to be in thermal equilibrium when macroscopic variables (like pressure, volume,...

Assumptions of Kinetic Theory of Gases Every gas consists of extremely small particles known as molecules. The molecules of a given gas are all identical but are different from those of another gas. The molecules of a gas are identical...

The branch dealing with measurement of temperature is called thremometry and the devices used to measure temperature are called thermometers. Heat Heat is a form of energy called thermal energy which flows from a higher temperature body to a...

Surface tension is the property of any liquid by virtue of which tries to minimize its free surface area.   Surface tension of a liquid is measured as the force acting per length on an imaginary line drawn tangentially on the...

Viscosity The property of a fluid by virtue of which an internal frictional force acts between its different layers which opposes their relative motion is called viscosity. These internal frictional force is called viscous force. Viscous...

Fluids Fluids are those substances which can flow when an external force is applied on it. Liquids and gases are fluids. Fluids do not have finite shape but takes the shape of the containing vessel, The total normal force exerted by...