Acceleration

 Acceleration

Dear friends, what is an Acceleration ?

As we all know it is a technical term comes under physics, but its even applicable for some of our day today applications as well. 

Accelerator in car.

Guys you know that when you press the accelerator, car will definitely speed up. Similarly acceleration is some property always  comes with the speeding up, that is changing the speed

Acceleration is defined as

Rate  which velocity is changing

Relationship between acceleration, change in velocity and time taken: time taken change in velocity,

 acceleration 

a = (v- u ) / t

v- u = change in velocity

t = time taken for velocity change

a (units) = m/s²  or  ms^-2  

Average speed

Speed  and  Average speed

Hay guys , as we all know speed is an indicator about  how past object is moving, 

💨💨

Technically rate which distance is changing, There fore speed is defined as 

Speed

 Relationship between   speed, distance moved and time taken can be given as 

   Speed   = distance moved / time taken

time taken distance moved. 

What is Average speed ? 

For a long journey you cant maintain your speed, it will very with the time , in such cases we need something to mention about how distance has change or  what is the average rate which speed has change. For that we can define Average Speed.

   Average speed   = Total distance moved / time taken

Sometimes Average speed can be zero ,  specially when an object returning back to the starting point after after completing one some part of a journey

What is the structure of atoms?

 What is the structure of atoms?

An atom has three parts:

Hence they are called as subatomic particles

Proton = positive

Neutron = no charge

Electron = negative

Elements are the alphabet to the language of molecules.

To make molecules, you must have elements.

Elements are made of atoms. While the atoms may have different weights and organization, they are all built in the same way.The proton & neutron are found in the center of the atom, a place called the nucleus. The electrons orbit the nucleus

The Bohr Model

The Bohr Model shows all of the particles in the atom.

In the center is circles. Each circle represents a single neutron or proton. Protons should have a plus or P written on them. Neutrons should be blank or have an N.

In a circle around the nucleus are the electrons. Electrons should have a minus sign or e

Cloud model

Now the model of atom is futher modified ,and consider the electron cloud model, which discribe arbaitary motion of electrons around the nuclus (protons and nutrons )