An Object Cools at a Rate (In ${ } ^ { \circ } \mathrm { C } / \mathrm { min }$

question 53

Multiple Choice

An object cools at a rate (in ${ } ^ { \circ } \mathrm { C } / \mathrm { min }$ ) equal to $\frac { 1 } { 10 }$ of the difference between its temperature and that of the surrounding air. If a room is kept at 20 $^\circ$ C and the temperature of the object is 28 $^\circ$ C, what is the temperature of the object 5 minutes later?

• A)22
• B)24
• C) \(20 + 5 e ^ { - 1 / 10 }\)
• D) \(20 + 8 e ^ { - 1 / 2 }\)
• E) \(20 + 5 e ^ { - 4 / 5 }\)
• F) \(20 + 8 e ^ { - 1 / 10 }\)
• G) \(28 - 8 e ^ { - 1 / 10 }\)
• H) \(28 - 10 e ^ { - 1 / 2 }\)

---

Definitions:

Process Cost Accounting

A method of accounting that accumulates and assigns costs to units of product in large quantities, where the products are indistinguishable from each other.

Separate Record

Maintaining independent records for different departments, entities, or operations within an organization for clarity and accountability.

Materials Requisitions

Requests for the supply of materials necessary for production or operational purposes within an organization.

Storeroom

A room or space used for the storage of goods or supplies, typically in a business or retail setting.