Mass number
The total number of protons and neutrons in the nucleus of an atom.
An object in a classroom that has a fixed point can be a pencil
A as the radiant from the object heats it up its kinda like thermal heat in a way
Answer : The change in momentum of an object is equal to the impulse that acts on it.
Explanation :
Change in momentum : The change in momentum of an object is the product of the mass and the change in velocity of an object.
The formula of change in momentum is,
![\Delta p=m\times \Delta v](https://tex.z-dn.net/?f=%5CDelta%20p%3Dm%5Ctimes%20%5CDelta%20v)
Impulse : An impulse of an object is the product of the force applied on an object and the change in time. Impulse is also equivalent to the change in momentum of an object.
![J=F\times \Delta t](https://tex.z-dn.net/?f=J%3DF%5Ctimes%20%5CDelta%20t)
Proof :
![J=F\times \Delta t\\\\J=(m\times a)\times \Delta t\\\\J=m\times (a\times \Delta t)\\\\J=m\times \Delta v=\Delta p](https://tex.z-dn.net/?f=J%3DF%5Ctimes%20%5CDelta%20t%5C%5C%5C%5CJ%3D%28m%5Ctimes%20a%29%5Ctimes%20%5CDelta%20t%5C%5C%5C%5CJ%3Dm%5Ctimes%20%28a%5Ctimes%20%5CDelta%20t%29%5C%5C%5C%5CJ%3Dm%5Ctimes%20%5CDelta%20v%3D%5CDelta%20p)
Hence, the change in momentum of an object is equal to the impulse that acts on it.