the resistance to the motion of a cart being pushed by a man is 220N, if the man pushed the cart a distance of 12KM how much work is done against the Resistance?​

the cellphone, they would then know if the killer would have contacted them or always hated them. or if it was a breakup. but if that is not the case, then it would be the clothing. to put in a bullet, it would have to be put in by hands. hands have finger prints which, would have giving you the answer of who done it.

explanation:

i think the answer is a, hope this is right, that would be my best guess.

need to see circuit to get time constant