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# The main uptake air duct of a forced air gas heater is

ISBN: 9781938168000 42

## Solution for problem 12PE Chapter 12

College Physics | 1st Edition

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Problem 12PE

The main uptake air duct of a forced air gas heater is 0.300 m in diameter. What is the average speed of air in the duct if it carries a volume equal to that of the house’s interior every 15 min? The inside volume of the house is equivalent to a rectangular solid 13.0 m wide by 20.0 m long by 2.75 m high.

Step-by-Step Solution:

Step 1 of 4</p>

This question is based on the concept of volume flow rate equation , where volume flow rate, area of cross-section and velocity of the fluid at that cross-section. We are first required to calculate the volume flow rate of air and then using , we can calculate the velocity.

Step 2 of 4</p>

The inside volume of the house,

m3

m3

Time min

s

s

Therefore, the volume flow rate,

m3/s

m3/s

Step 3 of 4

Step 4 of 4

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