Solve the problems below.1. A wind blows at the speec. of 30 m/s across a 175 m2 flat roof of a house.(a) Whar is the pressure difference between the inside of the house and theoutside of the house just above the roof? (Assume that the air pressureinside the house is atmospheric pressure.)(b) Whar is the force on the roof due to the pressure difference?2. Water e:nters a house frorm a ground pipe with an inside dianmeter of 0.02m at an absolute pressure of 4.0 x 105 Pa. A pipe that is 0.01 m in diameterleads to the second-floor bathroom 5.0m above the ground floor. The flowspeed ar the ground pipe :s 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-sectionalareas. Calculate the veloc.ty of the water at the section where:(a) the radius is 3.0 cm; and(b) the radius is 5.0 cm2021/3/20 21:08

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A wind blows at the speec. of 30 m/s across a 175 m² flat roof of a house. (a) Whar 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 differen.ce?

A wind blows at the speec. of 30 m/s across a 175 m² flat roof of a house. (a) Whar 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 differen.ce?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Fluid Pressure

The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.

Gauge Pressure

Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.

Topic Video

Question

Solve the problems below.
1. A wind blows at the speec. of 30 m/s across a 175 m2 flat roof of a house.
(a) Whar 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) Whar is the force on the roof due to the pressure difference?
2. Water e:nters a house frorm a ground pipe with an inside dianmeter of 0.02
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 ar the ground pipe :s 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 veloc.ty of the water at the section where:
(a) the radius is 3.0 cm; and
(b) the radius is 5.0 cm
2021/3/20 21:08

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