physics and Newton

The brightness of the physics was also increased by the great scientist Newton. He was a second great physics scientist. And also he makes the physics a great subject in the world. In physics after the name of Einstein, Newton was came he derived many theory and from his theory many instrument was made, and he became bright in physics.
Also he derived the theory about motion and it’s called Newton law of motion. I.e. first law of motion states that,” when the body is in motion and there is no external force is applied the body doesn’t change its path i.e. if the body is in motion it is always in motion.’’
Also Newton second law of motion states that,” the force applied in the moving body is directly proportional to the mass and acceleration of the body.’’
i.e. F=km
F=ka Combining this two equation and formed as,
F=kma
Where;
K is called Newton constant and in SI unit its value is 1.
And Newton third law of motion state that,” action and reaction are always equal and opposite side.”
This law is called the Newton law of motion.
Also Newton derived the theory about the velocity of sound in air. His equation is,
V=√p/d
Where,
V= velocity of sound in air,
d=density of medium,
p=atmospheric pressure,
From Newton equation the velocity of sound at NTP is 280m/s.
This equation is slightly wrong and it is corrected by Laplace and the equation called Laplace equation. i.e.
V=√yp/d
Where,
y= Cp/Co In diatomic gas y=1.4,

From this equation velocity of sound in air can be calculated exactly as 331.6m/s.