Heat and Mass Transfer: Fundamentals and Applications
5th Edition
ISBN: 9780073398181
Author: Yunus A. Cengel Dr., Afshin J. Ghajar
Publisher: McGraw-Hill Education
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Question 7
A well is pumped from a confined aquifer at a constant rate of 1000 gallons per minute (gpm). The following data were collected during the pumping
test:
.
Distance from the well to the observation well (r) = 150 feet
Differential drawdown (Ah) in the observation well at this distance = 2.5 feet
Aquifer properties:
Transmissivity (T) = 25,000 gpd/ft
• Storativity (S)- 0.0005 (dimensionless)
Pumping time (t) = 5 hours
Watch your units !!
Using the above information, calculate the drawdown (h) in feet in the observation well at a distance of 150 feet after 5 hours of pumping. (Use the
powerpoint slides for approximations for the well function W(u).
Qu 2 Calcium oxide (CaO) a white, caustic, alkaline solid that reacts vigorously with water to produce calcium hydroxide, releasing heat in the process. It is used in various industrial applications, including cement production and water treatment.
FA=
41{0
The ionic radii of the ions are: TCa2+= 0.100 nm and roz-= 0.140 nm.
On the basis of this information answer the following questions:
1. What is the type of bonding that exists in CaO crystal?
2.Calculate attractive (Fs) force in [N] between a Ca'* iron and O* ifon that is separated by an equilibrium distance ro.
Calculate repulsive (FR) force in [N] between a Ca?* iron and O? iron that is separated by an equilibrium distance ro.
What is the magnitude of the net force FN?
Show work if any equations or calculations are used.What is the main alloying element and carbon percentage of SAE-AISI 4621 Steel?
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- Qu 2 Calcium oxide (CaO) a white, caustic, alkaline solid that reacts vigorously with water to produce calcium hydroxide, releasing heat in the process. It is used in various industrial applications, including cement production and water treatment. The ionic radii of the ions are: TCa2+= 0.100 nm and roz-= 0.140 nm. On the basis of this information answer the following questions:Number 1 through 4 I need to show all work step by step problemsarrow_forwardShow work if any equations or calculations are used. Assuming hole basis, find the shaft and hole dimensions for a sliding fit using a basic hole size of 20mm. Show the max and minimum size for both hole and shaft. Utilize the equations and tables in the appendix.arrow_forwardShow work if any equations or calculations are used. A milling machine is equipped with a 1” diameter end mill. During a facingoperation, the spindle is running at 275 RPM. The depth of cut is 0.04” and linear feed rate is 2” per minute. Find: (a) Cutting speed, (b) Material Removal Ratearrow_forward
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