What diameter must a 17.0 m long air duct have if the ventilation and heating sy

Question

What diameter must a 17.0 m long air duct have if the ventilation and heating system is to replenish the air in a room 10.0m×16.0m×3.0m every 20.0 min ? Assume the pump can exert a gauge pressure of 5.70×104 atm . Express your answer to two significant figures and include the appropriate units.

The radius of the aorta is about 1.1 cm , and the blood passing through it has a speed of about 40 cm/s .

Calculate the average speed of blood flow in the major arteries of the body, which have a total cross-sectional area of about 2.2 cm2 .

Express your answer to two significant figures and include the appropriate units.

The radius of the aorta is about 1.1 cm , and the blood passing through it has a speed of about 40 cm/s .

Calculate the average speed of blood flow in the major arteries of the body, which have a total cross-sectional area of about 2.2 cm2 .

Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

Volume flow rate remains same in any part of the body

Qaorta = Q arteries [Q = Area*Velocity]

pi * (1.1)^2 * 40 = 2.2 *v

v = 69.11 cm/s

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