Approximately for which year did Aristotle mention the theory of the 4 elements?

Which biogeochemical cycle has the least activity because the essential element is mostly stored in rock?

Airbags will deploy in a head-on collision, but not in a collision that accurs from an angle

A tank contains 100 gallons of water and 50 oz of salt. water containing a salt solution of concentration 2 + sin t oz/gallon flows into the tank at a rate of 2 gal/min and the well mixed solution drains at the same rate. a.

Is the water temperature of Lake Michigan affected by the depth of the water?

if two gases of different mass are inside containers and the particles of both gaes have the same average molecular speed the gases must

For the following SN1 solvolysis reaction, select the correct rate equation and the overall reaction order (note: CH3OH is the solvent for the reaction). (CH3) 3CCl + CH3OH → (CH3) 3OCH3 + HCl

Which of the following is not a possible sublevel? 1s 2p 3f 4d

Fish breathe oxygen, o2, dissolved in the water. since water is a polar substance and oxygen is a nonpolar substance, how can there be any oxygen, o2, in the water?

Barium carbonate, baco3, is stable at ambient temperatures, but decomposes to barium oxide and carbon dioxide at higher temperatures.

How do an isotope and a radioactive isotope differ?