Nandas was the oldest dynasty of India. They were overthrown by Chandragupta Maurya.

Igneous rocks are formed due to the cooling solidification and crystallisation of hot and molten magma. They are hard granular and crystalline rocks, less affected by chemical weathering.

Prophet Mohammad was born in Mecca. He shifted to Madina in 622. This year is known as Hizri-Samuat.

During the G-20 Summit 2018 held in Buenos Aires, Argentina,all the above agendas war discussed.

2018 Theme of G-20 Summit- ‘Building Consensus for Fair and Sustainable Development’.

After the decline of Bahmani Kingdom it was divided into five Muslim separate states.

Inertia is the resistance, of any physical object, to any change in its velocity. This includes changes to the object's speed, or direction of motion.

The term “inertia” is more properly understood as shorthand for “the principle of inertia” as described by Newton in his First Law of Motion: that an object not subject to any net external force moves at a constant velocity.

If a system of objects is isolated from its environment and does not interact with its environment at all, then certain physical quantities of the system cannot change. They are constant or conserved. It may change forms, but the total amount of energy in an isolated system is constant.

The second law of thermodynamics states that the total entropy of an isolated system can never decrease over time. The total entropy of a system and its surroundings can remain constant in ideal cases where the system is in thermodynamic equilibrium, or is undergoing a reversible process.

A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit. Analog voltmeters move a pointer across a scale in proportion to the voltage of the circuit.

Radar Imaging Satellite 1, or RISAT-1, was an Indian remote sensing satellite built and operated by the Indian Space Research Organisation. The second RISAT satellite to be launched, it uses C-band 5.35 GHz Synthetic Aperture Radar for earth observation.