physics

A cylindrical air duct in an air conditioning system has a length of 3.5 m and a radius of 5.00 m. A fan forces air (ç = 1.8 Pa·s) through the duct, such that the air in a room (volume = 242 m3) is replenished every 12 minutes. Determine the difference in pressure between the ends of the air duct.

1. 👍 0
2. 👎 0
3. 👁 175
1. This kind of pipe flow problem needs to be solved with a friction factors based upon the Reynolds number. You do not explain the meaning of the term ç = 1.8 Pa·s. I don't know any relevant gas property with dimensions of Pascal-seconds.

Your duct length is less than the radius, which I consider highly unlikely.

1. 👍 0
2. 👎 0
posted by drwls

Similar Questions

1. physics

A cylindrical air duct in an air conditioning system has a length of 3.5 m and a radius of 5.00 X 10^-2 m. A fan forces air (ç = 1.8 X 10^-5 Pa·s) through the duct, such that the air in a room (volume = 242 m3) is replenished

asked by elmira on December 12, 2010
2. physics help

A cylindrical air duct in an air conditioning system has a length of 3.5 m and a radius of 5.00 10-2 m. A fan forces air (ç = 1.8 1 x0-5 Pa·s) through the duct, such that the air in a room (volume = 242 m3) is replenished every

asked by peter on December 4, 2010
3. Math

A company purchased an air conditioning system for \$10200. The shipping charges on the system were \$875, and the setup cost were \$1250. The system is expected to last for five years and has a residual value of \$2000. If you use

asked by Anonymous on April 19, 2010
4. Physics

A 19cm radius air duct is used to replenish the air of a room 9.2m x 6.0m x 4.0m every 18min . How fast does air flow in the duct?

asked by Sarah on November 3, 2012
5. Physics

A room measures 4.0 m by 3.9 m by 4.5 m. The heating and air-conditioning ducts to and from the room are circular with diameter 0.37 m and all the air in the room is to be exchanged every 14 min. (a) What is the average flow rate?

asked by Marisca on January 27, 2012
6. physics

A room has a volume of 164 m3. An air-conditioning system is to replace the air in this room every 26.8 minutes, using ducts that have a square cross section. Assuming that air can be treated as an incompressible fluid, find the

asked by RC on April 15, 2012
7. Physics

A room has a volume of 120 m^3. An air-conditioning system is used to replace the air in the room every twenty minutes, using ducts that have a square cross ection. Assuming that air can be treated as an incompressible fluid,

asked by ALan on March 16, 2010

A company purchased an air conditioning system for \$10,200. Shipping charges on the system are \$875. Setup costs were \$1,250. The system is expected to last for 5yrs and has a residual value at \$2000. If I use the straight-line

asked by CC on November 2, 2010
9. PHI103

If I move to Texas, I will need air conditioning. I don't need air conditioning. So I didn't move to Texas" is an argument form known as

asked by Krystal on April 8, 2013
10. Math

Could some one please explian how to do this problem thanks :) A company purchased an air conditioning system for \$10,200. The shipping charges on the system were \$875, and the set up cost were \$1,250,The system is expected to

asked by Anonymous on November 13, 2007

More Similar Questions