Question

Plz help me
if someone gives the right answer I will mark them as brainliest​

Answer 1

1)Anything, any group of particles numbering from 2 to infinity (theoretically) can form a system.

Since the bullet was inside the gun, they were in contact with each other before the bullet was fired. That means they were part of a system. As soon as bullet is fired chemical reaction takes place ( that rapidly ignites the gun powder which expands at a tremendous rate colliding with the bullet and pushing it from its shell - once again bullet and shell form a system. Shell heats up, and bullet gains energy - and the bullet which expands out of the gun. In other words it looses contact with the gun.

Newton's third law states that in a system, there are equal and opposing forces. Hence, when a constituent of a system leaves it, it leaves its so called trace marks behind a.k.a momentum in opposite direction.

• Hence, Gun goes back in proportion to its mass and bullet moves forward due to its exploding gunpowder.

━━━━━━━━❪❐━━━━━━━

2)

Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion.

Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.

Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object’s movement.

Put another way, speed is a scalar value, while velocity is a vector.

━━━━━━━━❪❐━━━━━━━

3)

Defects of Rutherford’s model of atom:

Defects of Rutherford’s model of atom:i) Electron rotating around the nucleus is only a suggestion without any experimental proof.

ii) A rotating electron normally will spend its energy and ultimately should fall into the nucleus. But this never happens in an atom. Rutherford suggestion, on electron rotating around the nucleus, does not offer any explanation for the fact, why electron does not lose energy.