Two charges are placed on the x axis. A charge of +q is placed at the point x=+L, and a charge of −q is placed at the point x=−L. If V=0 infinitely far away from the charges, what is the potential at the origin?

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.