A Machine Gear Consists of 0 $\degree$ ? (Specific Heats of Iron and Copper Are 450 and 0.16

Multiple Choice

A machine gear consists of 0.10 kg of iron and 0.16 kg of copper.How much total heat is generated in the part if its temperature increases by 35 C $\degree$ ? (Specific heats of iron and copper are 450 and 390 J/kg* $\degree$ C,respectively. )

A) 910 J
B) 3 800 J
C) 4 000 J
D) 4 400 J