How does the radius of the electron cloud compare to the radius of the nucleus?
a.
it is about 100 times larger
c.
it is about 50,000 times larger
b.
it is almost 50 times smaller
d.
it is about 100,000 times larger

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.