Nancy is falling for 10 seconds. Assuming free fall, which of the following is/are true?

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )