Answer :
Since water has a higher specific heat capacity than the metal, the metal will heat up first before the water.
Specific heat capacity
The specific heat capacity is the amount of heat required to raise the temperature of 1 Kg of a substance by 1K. The heat capacity of water is far higher than the heat capacity of the matal.
The substance with a lower heat capacity will heat up first hence the metal will heat up first before thw water.
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