What types of energies are used when a person chews food? A. mechanical and chemical
B. mechanical and electrical C. chemical and electrical
D. magnetic and mechanical

Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?

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.

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?