Initial momentum of boxcar?

Initial momentum of locomotive?

Total initial & final momentum of boxcar & locomotive?

i believe it is b. what was the cause of the big bang

hope this !

when it gains or loses electrons

do you have a formula possibly

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force