Laws of Conservations in Physics || By- neettyari

In any physical phenomena taking in nature, several quantities change with time, while some special physical quantities remain constant with time. The later quantities are 'conserved quantities' of nature, and are governed by certain laws of conservation.


Conservation laws in Physics


Some of the general laws of conservation on which we are going to discuss in this post are as follows :-




Laws of Conservations of nature in Physics




1) Conservation of Mechanical Energy


For motion under an external conservative force (A conservative force is a force with the property that the total work done in moving a particle between two points is independent of the taken path), the mechanical energy (Kinetic energy + Potential energy) of a body is a constant.




2) Conservation of Total Energy of an Isolated System


The mechanical energy is conserved if the forces involved are conservative. If some of the forces doing work non-conservative (such as air friction), part of the mechanical energy transformed into other forms.




3) Conservation of Mass Plus Energy


Before Einstein, the law of conservation of mass was considered as a basic law in nature because matter was thought to be indestructible. But, Einstein, by his theory of relativity proved that energy conservation and mass conservation are not two independent laws ; they are unified in a single law. According to it, the total (mass + energy) of the universe is conserved.

                   ∆E = (∆m) c^2




4) Conservation of Momentum



Energy is a scaler quantity. All conserved quantities are, however, not necessarily scalers. The total linear momentum and the total angular momentum (both vector) of an isolated system are also conserved quantities. These laws are derived from Newtown laws of motion in mechanics. These are the basic conservation laws of nature in all domains.




5) Conservation of Charge


Conservation of electric charge of an isolated system is a fundamental law of nature. The total amount of charge in an isolated system remains constant. It means charge can neither be created nor destroyed.




6) Conservation of Mass Number


In all nuclear reactions, the number of nucleons remains conserved. There is rearrangement of protons and neutrons in different nuclear reactions, but the total number of neutrons and protons is separately equal for the reactants and the products.





Also read


2 comments:

  1. Bro, How to solve valuable inventory under construction. Please help me bro.

    my email id scvasanth7@gmail.com

    ReplyDelete
    Replies
    1. Please share your website link, so that I can analyse it and solve your problem

      Delete

Powered by Blogger.