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Can someone show me how to convert 23.92in Hg to torr? Can 115 volt appliances work safely with 120 volt wall outlets? Will they fry from a slightly smaller voltage? The moon phobos orbits mars (mass= 6.42 x 10^23 kg) at a distance of 9.38 x 10^6 m. what is its period of orbit? Vector x is such that x*a = 0 for any vector a. Need to prove x = 0? Use the graph below to estimate f(-9).?