A: a person sitting on a train
Hence person could have a meal and not get food all over them.
Valence electrons are the electrons in the outermost energy level of an atom — in the energy level that is farthest away from the nucleus.
I think it's A.
Answer:
A 70 kg box is slid along the floor by a 400 n force. The coefficient of friction between the box and the floor is 0. 50 when the box is sliding
I think its d. but im not sure
B is you answer sorry i dont quite know how to explain it in a way that you and anybody else would understand it.
