In the water cycle, the sun's heat provides energy to evaporate water from the earth's surface (oceans, lakes, the water vapor eventually condenses, forming tiny droplets in clouds. when the clouds meet cool air over land, precipitation (rain, sleet, or snow) is triggered, and water returns to the land (or sea). the water flows downhill as runoff (above ground or underground), eventually returning to the seas as slightly salty water. and then the cycle starts over. droughts, periods of time with below average rainfall, result from a lack of precipitation. imagine an area along the coast that normally receives rain clouds that develop over the ocean and move in toward land. if this coastal area is currently experiencing a drought, how would a decrease in evaporation from the ocean affect the drought?

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Listen base your answer to the question on the information below. propane is a fuel that is sold in rigid, pressurized cylinders. most of the propane in a cylinder is liquid, with gas in the space above the liquid level. when propane is released from the cylinder, the propane leaves the cylinder as a gas. propane gas is used as a fuel by mixing it with oxygen in the air and igniting the mixture, as represented by the balanced equation below. c3h8(g) + 5o2(g) → 3co2(g) + 4h2o() + 2219.2 kja small amount of methanethiol, which has a distinct odor, is added to the propane to consumers detect a propane leak. in methanethiol, the odor is caused by the thiol functional group (–sh). methanethiol, ch3sh, has a structure that is very similar to the structure of methanol. what is the correct structural formula for a molecule of methanethiol

What does the symbol (–hfus) indicate in a phase change?