Answers edited by Mike G.

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• If a strong man lifts a barbell with a mass of 125.7 g and does 5023 joules of work, how high did he lift it?
  
• Question #e76e2
  
• What dimensions of the rectangle will result in a cylinder of maximum volume if you consider a rectangle of perimeter 12 inches in which it forms a cylinder by revolving this rectangle about one of its edges?
  
• What do vibrato and tremolo mean?
  
• Question #f23b2
  
• Is Gibbs free energy affected by a catalyst?