Find the potential energy of this roller coaster when it is halfway down the hill.​

What is the maximum acceleration of the wing tips, in units of g?

What changes occur in the brain during the teenage years? 25 points, someone me out!a.) thinking becomes slower as the brain grows larger. b.) connections between neurons become stronger and faster. c.) unused neurons fuse together to form larger, better functioning neurons. d.) more neurons are developed.

The substances that are necessary for producing of certain hormones and that store and transport vitamins