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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? Since the earth is moving and galaxies are moving how did Hubble calculate the red shift in the frequency of light? How many molecules of propane were in the Erlenmeyer flask? Avogadro's number is 6.022 × 10^23 molecule/mol.
0.274g (mass in flask) 44.10=MM? If summation a^2k converges, does summation (ak) converges? prove.? Pi in base 12 starts out 3.1848. Is this more or less accurate than the base 10 value 3.1416?