It was developed by scientists throughout history of mankind
Answer:
Air seal you attic so you keep outside air out and inside air in, get new energy efficient windows, replace old appliances so they take up less energy, keep your water heater warm so that you use less energy by heating up water, switch from incandescent lights to fluorescent lights. Add solar panels.
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Have a nice day((:
Explanation:
I think they describe a structure of cyclopentane. Cyclopentane is a highly flammable alicyclic hydrocarbon with a chemical formula C₅H₁₀, consisting of a ring of five carbon atoms each bonded to hydrogen atoms above and below the plane. It occurs as a colorless liquid with a petrol-like odor.
Answer: ummmmmmmmmmmmmm someone plz help i didn't learn this
Explanation: bad werewolf
