PLEASE HELP M. A girl throws a ball 15 m into the air. The ball has the maximum potential energy at a height of a. O m.
b. 5 m.
c. 10 m.
d. 15 m.

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix. b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds. c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer. d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.

List and describe three ways that humans can change ecosystems and three ways that humans can protect ecosystems.

The potential energy for a mass on a spring is proportional to the square of which of these quantities? a. mass b. frequency c. period d. displacement e. velocity