This is a big one, me out

suppose you want to know if the water in a certain stream is safe to drink. what ecologi- cal method(s) would you use in your investigation? explain your reasoning and outline your procedure.

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by the way, i need someone who can me in private : )

i think the answer is g1

hope i

-lavira: )

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.