Momentum is a vector quantity, and is always conserved. Whenever a collision occurs between two objects, the objects behave under the principle of conservation of momentum. Therefore, if an object moves in the direction opposite to its original direction after a collision, then this indicates that the momentum of the colliding object was greater than the object under consideration.
1. becuase it is so hot that it could tan or be used to keep warm.
The answer is a because it never needs to be insulated
The same amount of work being done over a long period of time!
