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If an object that floats on the surface displaces 10cm3 of water, how much does that object weight? Suppose 1.25mol of a gas has a pressure of 0.98atm & a temp. of 295K. Given that R is 0.082L atm mol-1 K-1, what volume will this gas occupy? Math question regarding determinants!? How does sin pi/12= sin 11pi/12? Using the opposite angle identities? Can I run an inverter type welder, rated at 3 Ph, 400V (for Europe), with 3Ph, 460V power, which is available in the United States?