Define about the heat loss, Physics

Define about the Heat Loss?

An immersion heater of power J=500 W can be used to heat water in a bowl. After 2 minutes the temperature enhance from T₁=85^oC to T₂=90°C. The heater is after that switched off for an additional minute and the temperature drops ΔT = 1°C. By estimation the mass of the water in the bowl and The thermal capacity of water c= 4.2 • 10³j/kg K.

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