Use the periodic table in the tools bar to complete the electron configurations for the following elements: Beryllium (Be): 1sC2sD

C =

D =

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Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.

Need what is special about water as a compound? how does water regulate climate? what drives water evaporation?   why is the water vapor fresh water when it rises from the ocean? why might freshwater in the form of snow take longer to enter the water cycle again than liquid precipitation?   what is an aquifer? what role do people play in the water cycle? plz just answer as many as you can ! thx if you !