A Machine Part Consists of 0 $\mathrm { J } / \mathrm { kg } \cdot \mathrm { K }$

Multiple Choice

A machine part consists of 0.10 kg of iron (of specific heat 470 $\mathrm { J } / \mathrm { kg } \cdot \mathrm { K }$ ) and 0.16 kg of copper (of specific heat 390 $\mathrm { J } / \mathrm { Kg } \cdot \mathrm { K } )$ How much heat must be added to the gear to raise its temperature from $18 ^ { \circ } \mathrm { C } \text { to } 53 ^ { \circ } \mathrm { C } ?$

A) 910 J
B) 4000 J
C) 3800 J
D) 4400 J