3. a projectile is fired from a vertical cliff edge (height = 100 m) with a horizontal velocity of 20
m/s. the projectile hits the ground (height = 0 m) approximately:
a. 180 m from the base of the cliff
b. 90 m from the base of the cliff
c. 7 s after being fired
d. 9 s after being fired
e. 90 s after being fired

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

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a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..