The Coefficient of Thermal Expansion of Water at 20ºC Is

question 39

Multiple Choice

The coefficient of thermal expansion of water at 20ºC is 0.207 x 10^-3 K^-1 A thin glass tube contains a 75.0 cm column of water at 20ºC. If the thermal expansion of the glass tube is negligible, by how much does the length of the column of water expand when it is heated to 80ºC?

• A) 3.1 mm
• B) 9.3 mm
• C) 12.4 mm
• D) 4.1 mm
• E) 28 mm

---

Definitions:

Projected Benefit Obligation

The present value of estimated future pension benefits owed to employees, based on expected salary increases.

Prior Service Cost

Costs that arise when a pension plan is amended to increase benefits for employee service provided in prior periods, recognized over the service periods of affected employees.

Unrecognized Prior Service Cost

Costs associated with retroactive benefits granted in pension plans, which are not immediately recognized as an expense but are amortized over time.

Years-Of-Future-Service Method

An actuarial technique used to calculate pension benefits, taking into account the expected years of service remaining for an employee.