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  What metal is used for the sacrificial anode in a hot water heater? Does the metal leach into the water?
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  In a flower preservative that uses softdrinks, Why do you have to mix softdrinks with water, instead of just using softdrinks.
• 
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• 
  If a color can't cover or expose some parts of the body then how can wearing a certain color of clothing make you hotter or cooler