Question Detail

PHY 101 PHY 101 Past Questions Objective Question
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Question

The pulmonary artery, which connects the heart to the lungs, is 8.5 cm long and has a pressure difference of 450 Pa. If the inside radius is 2.4 mm, what is the average speed of blood? (Viscosity η = 0.00272 N·s/m²)
Options
A 4.1 m/s
B 14 m/s
C 1.4 m/s
Correct Answer
D 41 m/s
Correct Answer

Option C is the correct answer.

Detailed Explanation

The average speed of blood is approximately 1.4 m/s.

Hint

Use Poiseuille's law for flow rate in a cylindrical tube.

Question Info

Course: PHY 101
Topic: PHY 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 131 of 1250
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