A rocket is fired vertically upward from the ground with an initial velocity of 29 m/s. Neglecting air resistance, (a) how long does the rocket take to reach its
maximum height? (b) How long does it take to return to the ground? (c)
Determine the maximum height reached by the rocket.
Answer and Solution:

Can you think of a way a rock unit with an older fossil could be above a rock until with a younger fossil? describe the scenario.

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.

Explain what will happen if decomposers were apsent from a forest ecoysystem.