Gravitation | Class 9 Notes | Science | Term 2 | When a body is thrown up it reaches a certain height and then falls down. The downward pull of the Earth on the body decreases its velocity in the upward direction to zero at some height as a result the body cannot rise further.
The smallest particle of an element that can exist chemically is an atom. Dalton assumed that atom is indivisible. But experiments in late 1800s and early 1900s revealed that the atom is made up of three sub atomic particles- electrons, protons and neutrons. The atom is neutral in nature since it has equal number of
Matter is everything around you. Everything that possess mass and occupy space or volume is matter and can be felt by one or more of our five senses. It was postulated by Maharashi Kanad that if we divide Padarth (matter) we will get smaller and smaller particles. After a time it will not be possible