Question Detail

PHY 101 PHY 101 Past Questions Objective Question
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Question

Calculate the rate of heat flowing from outside through a glass window 2.25 m × 1.75 m in area and 3.5 mm in thickness, if the temperatures at the outer and inner surfaces are 29.0°C and 26.0°C, respectively. Take conductivity of glass to be 0.84 J/(m·s·°C).
Options
A 2.8 kJ/s
Correct Answer
B 28 kJ/s
C 280 kJ/s
D 2800 kJ/s
Correct Answer

Option A is the correct answer.

Detailed Explanation

The rate of heat flow is approximately 2.8 kJ/s.

Hint

Use Fourier's law of heat conduction: Q/t = kAΔT/d.

Question Info

Course: PHY 101
Topic: PHY 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 156 of 1250
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