Air is flowing horizontally at a speed of 100 mph through a duct 4 sq.ft. in cross section. The duct gradually narrows down to a throat section. If a U-tube shows a difference in pressure between the throat and main sections of 7 in. of water, what is the cross-sectional area of the throat? (Assume that the air is non-compressible and has a density of 0.002377 slug per cu ft.)

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)...
icon
Related questions
icon
Concept explainers
Topic Video
Question

please help me in my homework thank u

1. Air is flowing horizontally at a speed of 100 mph through a duct 4 sq.ft. in cross
section. The duct gradually narrows down to a throat section. If a U-tube shows a
difference in pressure between the throat and main sections of 7 in. of water, what
is the cross-sectional area of the throat? (Assume that the air is non-compressible
and has a density of 0.002377 slug per cu ft.)
2. Water flows through a horizontal pipe at the rate of 800 gal. per min. What is the
difference in pressure between a point where the diameter is 2 in. and a point where
the diameter is 1 in.?
3. A pitot-static tube is used to measure the airspeed at the test section of a wind
tunnel. The pressure difference across the pitot-static tube is 0.11 m of water. If the
ratio of the cross-sectional area between the largest section and the test section is
100:1, what is the airspeed at the test section? Assume incompressible flow at
standard sea level conditions.
4. The diameter of a horizontal tube is 4 ", in which tetrabromoethane (specific gravity
= 0.30) is flowing at the rate of 0.50 cu ft. per sec. The pressure is 3o Ib. per sq. in.
(gage). If the tube gradually decreases to 0.25' in diameter, what is the pressure
there?
5. Consider water flowing through a smooth pipe whose diameter is decreasing. At one
location, the diameter is 12 cm. If the velocity there is 10 m/s, (a) find the mass flow
rate. (b) At a station farther down the pipe, the diameter is 4cm. Find the velocity at
this station.
Transcribed Image Text:1. Air is flowing horizontally at a speed of 100 mph through a duct 4 sq.ft. in cross section. The duct gradually narrows down to a throat section. If a U-tube shows a difference in pressure between the throat and main sections of 7 in. of water, what is the cross-sectional area of the throat? (Assume that the air is non-compressible and has a density of 0.002377 slug per cu ft.) 2. Water flows through a horizontal pipe at the rate of 800 gal. per min. What is the difference in pressure between a point where the diameter is 2 in. and a point where the diameter is 1 in.? 3. A pitot-static tube is used to measure the airspeed at the test section of a wind tunnel. The pressure difference across the pitot-static tube is 0.11 m of water. If the ratio of the cross-sectional area between the largest section and the test section is 100:1, what is the airspeed at the test section? Assume incompressible flow at standard sea level conditions. 4. The diameter of a horizontal tube is 4 ", in which tetrabromoethane (specific gravity = 0.30) is flowing at the rate of 0.50 cu ft. per sec. The pressure is 3o Ib. per sq. in. (gage). If the tube gradually decreases to 0.25' in diameter, what is the pressure there? 5. Consider water flowing through a smooth pipe whose diameter is decreasing. At one location, the diameter is 12 cm. If the velocity there is 10 m/s, (a) find the mass flow rate. (b) At a station farther down the pipe, the diameter is 4cm. Find the velocity at this station.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Knowledge Booster
Fluid Pressure
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.
Recommended textbooks for you
College Physics
College Physics
Physics
ISBN:
9781305952300
Author:
Raymond A. Serway, Chris Vuille
Publisher:
Cengage Learning
University Physics (14th Edition)
University Physics (14th Edition)
Physics
ISBN:
9780133969290
Author:
Hugh D. Young, Roger A. Freedman
Publisher:
PEARSON
Introduction To Quantum Mechanics
Introduction To Quantum Mechanics
Physics
ISBN:
9781107189638
Author:
Griffiths, David J., Schroeter, Darrell F.
Publisher:
Cambridge University Press
Physics for Scientists and Engineers
Physics for Scientists and Engineers
Physics
ISBN:
9781337553278
Author:
Raymond A. Serway, John W. Jewett
Publisher:
Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:
9780321820464
Author:
Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:
Addison-Wesley
College Physics: A Strategic Approach (4th Editio…
College Physics: A Strategic Approach (4th Editio…
Physics
ISBN:
9780134609034
Author:
Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:
PEARSON