Question

The blood flows through a large artery extending from heart to lungs with a radius of 2.5 mm and 15 cm long. The pressure across the artery ends is found to be 380 Pa then what is the blood's average speed ? (Coefficient of viscocity of blood is 0.0027 Poiseulli)

1) 0.0286 mm/s
2) 0.0144 mm/s
3) 0.0073 mm/s
4) 0.00073 mm/s​

Answer 1

Explanation:

Given The blood flows through a large artery extending from heart to lungs with a radius of 2.5 mm and 15 cm long. The pressure across the artery ends is found to be 380 Pa then what is the blood's average speed ?

• So Radius = 2.5 mm = 2.5 x 10^-3 m
• Length l = 15 cm = 0.15 m
• Viscosity = 0.0027
• So pressure difference = 380 (P1 – P2)
• Now average speed  
•                 Q = ΔP π r^4 / 8 Ƞ l
•                    = 380 x 3.14 x (2.5 x 10^-3)^4 / 8 x 0.0027 x 0.15
•                                     = 380 x 3.14 x 39.0625 x 10^-12 / 0.00324
•                                     = 0.0144 mm/s

Reference link will be

https://brainly.in/question/1513650

Answer 2

Answer:

in final calculation.. I do one mistake...

0.0073.. Is the final answer...

pls see that one clearly

Explanation:

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