- Is the distance between any two different real numbers always positive?

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What is a dimension? How many dimensions can we confirm? Find the sum of first ten terms of arithmetic series if A3=5, A4=8? Why does the moon set earlier in the winter than in the summer? Where does the gas in the gas chambers come from? 2 S + 3 O2 -> 2 SO3 If 5 moles of sulfur is reacted with 7 moles of oxygen gas, what is the limiting reagent?