PH-2209

Specific heat capacity

Physics · Secondary 4 · Hard · Specific heat capacity

A 2.0 kg block of metal is heated by a 400 W electric heater. Its specific heat capacity is

900\,\text{J/(kg °C)}

. The temperature of the block rises from

20\,°C

80\,°C

. Using

E = mc\Delta T

and

P = E/t

, calculate the time taken for this temperature rise.

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