51. How many watt heater kettle, if 1 liter of water bo

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Description

51. How many watt heater kettle, if 1 liter of water boils in 3 minutes? Is the resistance heater when the voltage in the 220V. The initial temperature of 5 ° C. The efficiency of the heater to 80%.

Additional information

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)

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