Charges of 3.00 nc, -2.00 nc, -7.00 nc, and 1.00 nc are contained inside a rectangular box that has a length of 2.50 m, a width of 1.50 m, and a height of 1.25 m. nearby but outside the box are charges of 1.00 nc and 4.00 nc. what is the net electric flux through the surface of the box?

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.