Question: A metal bar whose temperature is is 20C placed in boiling water. How long does it take to heat the bar to practically 100C say,

A metal bar whose temperature is is 20°C placed in boiling water. How long does it take to heat the bar to practically 100°C say, to 99.9°C, if the temperature of the bar after 1 min of heating is 51.5°C? First guess, then calculate.

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