The farther apart you move your hands, the stronger the force of the rubber band pulling your hands together.  Dan wanted to flick Carlos hard with a rubber band. To flick him the hardest, Dan needs to move his hands closer or further away?
further away

In electromagnetic waves with higher frequencies, photons have more energy.  If Jim decreases the frequency of the radio waves on his shortwave radio, will the radio use less energy? or more or?
less energy?

The harder the batter hits the ball, the greater will be its acceleration.  Jim was at the baseball game with his friends. Almost immediately he observed that the harder the ball was hit, the effect on the acceleration was decreased or increased?
increased

The harder the batter hits the ball, the greater will be its acceleration.  If Jim wants to increase the amount of acceleration applied to a baseball he must hit it harder or softer?
harder