At What Rate Is Heat Lost Through a 1

question 10

Multiple Choice

At what rate is heat lost through a 1.5 m × 3.0 m rectangular glass windowpane that is 0.4 cm thick when the inside temperature is 22 °C and the outside temperature is 6.0 °C? The thermal conductivity for the glass is 0.75 W/(m · C°) .

• A)560 W
• B)1800 W
• C)7200 W
• D)3600 W
• E)13 500 W

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Definitions:

Modified Duration

A measure of the sensitivity of a bond's price to a change in interest rates, adjusting for the fact that the bond's cash flows change as yields change.

Maturity

The specific day when the core sum of a financial product, like a bond or loan, must be paid back to the investor.

Semiannually

Occurring twice a year; every six months.

Zero-coupon Bond

A type of bond that does not pay interest during its life; it is sold at a discount from its face value and the return is realized when the bond matures.