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

question 5

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

---

Definitions:

Proportion

A portion, fraction, or quantity assessed in relation to its total entity.

Business

An organization or enterprising entity engaged in commercial, industrial, or professional activities.

Consumer Price Index

An index measuring the change in the price level of a basket of consumer goods and services purchased by households.

Basket

A collection of goods, services, or financial instruments grouped together for the purpose of analysis, comparison, or investment.