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how many liters of oxygen are required to produce 2 liters of water at stp?
how many hummingbirds, on average, does it take to tip a scale to one ounce?
how long would it take to travel to the center of the milky way galaxy
what was the wilmot proviso, and how did it impact the national debate over slavery?
how concentrated can lye solution be before its ph rises above calcium hydroxide saturated water?
how did the nuclear arms race affect life in the united states in the 1950s
how to allow my rpi to connect to my computer via ethernet on windows 10
how many constitutions has the united states had since the end of the revolutionary war