A. An isolated capacitor has air between its plates.
b. The capacitor is charged by a battery.
c. After the capacitor is charged, the battery is removed.
d. A dielectric slab k is then inserted between its plates.
e. Finally, the capacitor is discharged by bringing the two terminals close together, which causes a spark.

The Discharge spark will be:

i. The same as it would have been without the dielectric being inserted.
ii. Less energetic than it would have been without the dielectric being inserted.
iii. More energetic than it would have been without the dielectric being inserted.

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

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.

I'm pretty sure the answer is c