Liv has just seen a commercial advertising a fancy kind of make-up that she would like to buy. She does not have a pen or a piece of paper to write down the telephone number, so she repeats to herself over and over again while she runs into the kitchen to find the telephone. Liv is currently using the process of rehearsal to keep the telephone number active in her short-term memory.

=force × distance a. work b. velocity c. pressure d. momentum

The necleus of an atom is made up of what subatomic particles?

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?