What component in a circuit does this symbol represent?

AC power source

Explanation:

the symbol in the figure represents an AC power source. An AC power source is a generator of alternate current (AC), which is a current that periodically reverts its direction: therefore, when connected to a circuit, the electrons flow at the beginning in one direction, then in the opposite direction, then again in the original direction, and so on..

moving ball hits still ball. mover stops, hit ball moves. momentum transfer.

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.