Energy

                              Energy

We sometimes describe energy as 'ability to do work' like spinning, running, heating etc. All these activities need energy. By the law of conservation Energy can't be created nor be destroyed e.g. if you switch on the fan the electrical energy is converted into kinetic (motion) energy and heat energy.
The main source of energy is the sun,
The light energy of sun is converted into chemical energy and used by plants which then eaten by us. There are many type of energies around us-

1.  Kinetic energy  is energy acquired a                object when it gain motion for example I      started walking then I gained kinetic              energy.
2.  Potential energy  is latent energy of                stationary object which when force is            applied convert into kinetic or any other      form of energy.
There are many more types of energies but I'll explain it later.

                               Work
Work is done when force is applied to an object and it displaces from its initial place.
It is usually expressed as (W).

                               Power
Power is rate of doing work e.g. two boys climbs a hill one did it faster than she said to be possess more power.

Quantum mechanics

Quantum mechanics is a branch of physics deals with description of physical phenomena at atomic and sub-atomic level. It state that many concepts concerned with physical objects and energy behave differently. It provides accurate description of behavior of photon, electron etc.

  It's applications include super conducting magnet, LEDs and lasers and description for many biological and physical phenomena.

Max Planck is considered as father of quantum theory as he corrected Ludwig Boltzman and Wien's law.

He also proposed the formula:

   E= hv, where E is energy element and v is frequency. h is Planck's constant. 

Read more here.

Gravity

Gravity is a natural phenomenon. Accurately described by Albert Einstein in 1915. Every object in universe is exerting force on other objects. Gravity is directly proportional to Mass (sometimes refers as weight, in normal conversation) that means heavier the object will be more gravitational force it will exert. Gravity is also indirectly proportional to distance     i.e. more the distance will be lesser force it exert.

However gravity is attractive force (it always attract other object). Earth is constantly attracting you towards the surface. The force an object exert on the other can be calculated by:
            F=G×M×m/r×r
Where G is gravitational constant equals
6.674×10^-11 Nm^2/kg^2

Using this formula scientists accepted 9.80665 m/s as gravitational force of earth.

According to Newton's 3rd law every action has equal and opposite reaction. If earth attract some object it move towards it till they collide though If the object is smaller it will move relatively fast than earth.

It raisen a question
Why moon doesn't collide with earth?

I'll answer that for sure but in another blog.

Read more: here

Reasons

It's being a boredom for me to have nobody matching my curiosity for science around me. So now I started this blog for sharing my knowledge and experience to my reader.