Solve the problems below. 1. A wind blows at the speed of 30 m/s across a 175 m2 flat roof of a house. (a) What is the pressure difference between the inside of the house and the outside of the house just above the roof? (Assume that the air pressure inside the house is atmospheric pressure.) (b) What is the force on the roof due to the pressure difference?

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Solve the problems below. (use bond paper for your output/ draw/illustrate)
Solve the problems below.
1. A wind blows at the speed of 30 m/s across a 175 m2 flat roof of a house.
(a) What is the pressure difference between the inside of the house and the
outside of the house just above the roof? (Assume that the air pressure
inside the house is atmospheric pressure.)
(b) What is the force on the roof due to the pressure difference?
2. Water enters a house from
m at an absolute pressure of 4.0 x 105 Pa. A pipe that is 0.01 m in diameter
leads to the second-floor bathroom 5.0m above the ground floor. The flow
speed at the ground pipe is 1.5 m/s. Find the following:
(a) flow speed on the second floor; and
(b) pressure.
3. Water flows at a rate of 800 cm3/min in a pipe of varying cross-sectional
areas. Calculate the velocity of the water at the section where:
(a) the radius is 3.0 cm; and
(b) the radius is 5.0 cm
ground pipe with an inside diameter of 0.02
Transcribed Image Text:Solve the problems below. 1. A wind blows at the speed of 30 m/s across a 175 m2 flat roof of a house. (a) What is the pressure difference between the inside of the house and the outside of the house just above the roof? (Assume that the air pressure inside the house is atmospheric pressure.) (b) What is the force on the roof due to the pressure difference? 2. Water enters a house from m at an absolute pressure of 4.0 x 105 Pa. A pipe that is 0.01 m in diameter leads to the second-floor bathroom 5.0m above the ground floor. The flow speed at the ground pipe is 1.5 m/s. Find the following: (a) flow speed on the second floor; and (b) pressure. 3. Water flows at a rate of 800 cm3/min in a pipe of varying cross-sectional areas. Calculate the velocity of the water at the section where: (a) the radius is 3.0 cm; and (b) the radius is 5.0 cm ground pipe with an inside diameter of 0.02
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