The video described the transfer of energy involved when hitting a golf ball. Think of another event from your life that you do regularly. Explain how energy is transferred between different types in your new scenario.

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

Which planet do you think would be easiest for humans to colonize some day?

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?