Match each front with its description.
cold front
when two cold fronts force a warm front up
and block it from the surface
stationary front
when a cold air mass slides under a warm
air mass
occluded front
when a cold air mass and a warm air mass
meet and do not move
warm front
when a warm air mass slides over a cold air
mass

What is required for an electric charge to flow through a wire? zero resistance in the wire a balance of electric potential high resistance in the wire a difference in electric potential

Asilver dollar is dropped from the top of a building that is 1324 feet tall. use the position function below for free-falling objects. s(t) = −16t2 + v0t + s0 (a) determine the position and velocity functions for the coin. s(t) = v(t) = (b) determine the average velocity on the interval [1, 2]. ft/s (c) find the instantaneous velocities when t = 1 second and t = 2 seconds. v(1) = ft/s v(2) = ft/s (d) find the time required for the coin to reach the ground level. (round your answer to three decimal places.) t = s (e) find the velocity of the coin at impact. (round your answer to three decimal places.) ft/s

Which of the following are forms of phase changes a. freezing b. condensation c. heating d. exchanging