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Bohrs Atomic Model

Bohrs Atomic Model Scientist Neils Bohr gave some corrections to Rutherford's atomic model in 1913. This corrected model is called the Bohr's atomic model. The main postulates of this model are - a) The electron moves around the nucleus in a circular motion, about an axis. This circular motion is called an energy level or orbit. They are also known as the shell or permanent orbit or principal energy level. Electrons do not absorb or emit any energy when they revolve these fixed orbits. If we express the permanent orbit as n, then n = 1, 2, 3, 4, etc.  In other words, if n = 1, the principal energy level is K,  when n = 2, L is the principal energy level,  when n = 3, M is the principal energy level,  when n = 4, N is the principal energy level, etc. b) According to Bohr's model, the angular momentum of an electron in an energy level is mvr =  nh / 2𝜋 . Here, m = the mass of the electron (9.11×10 -31  kg) r = the radius of the orbit that the electron follows v = the veloc

How to make a cup of coffee

How to make a cup of coffee 

or Making coffee 

or Write simple instructions on 'How to make a cup of coffee.

Making a cup of coffee is an easy task. But to make it tasty, we have to follow a certain process. The first step of the process is the bolting of water in a pot or kettle. The quantity of water should be according to the cups of coffee we need. After boiling water for at least five to ten minutes, we have to add the right quantity of granulated coffee powder to it. The next, step is adding sugar according to necessity and mixing it with the boiled water with a teaspoon. Then, we have to add some milk if we want milk coffee. Finally, we have to pour the liquid into a cup or cups for serving. Thus, making a cup of coffee is not a difficult process at all.

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