Thinking Like an Engineer: An Active Learning Approach (4th Edition)
Thinking Like an Engineer: An Active Learning Approach (4th Edition)
4th Edition
ISBN: 9780134639673
Author: Elizabeth A. Stephan, David R. Bowman, William J. Park, Benjamin L. Sill, Matthew W. Ohland
Publisher: PEARSON
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Chapter 6.2, Problem 3CC

Create a list of variables and constants for the following problem.

Calculate the mass in kilograms of gravel stored in a rectangular bin 18.5 feet by 25.0 feet. The depth of the gravel bin is 15 feet, and the density of the gravel is 97 pound-mass per cubic foot.

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In a process of metal casting, the final product’s volume is 1275 cm3. Casting waste, scrap allowance, and shrinkage allowance are 8%, 12%, and 3.5%, respectively. The metal supplier pays $0.5/kg, irrespective of the type of metal. Determine the material cost, if the following metals are used for casting:a. Aluminum (ρ = 2.7 g/cm3 ; cost = $1.85/kg)b. Grey Iron (ρ = 6.8 g/cm3; cost = $1.38/kg)
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In a process of metal casting, the final product’s volume is 1275 cm3. Casting waste, scrap allowance, and shrinkage allowance are 8%, 12%, and 3.5%, respectively. The metal supplier pays $0.5/kg, irrespective of the type of metal. Determine the material cost, if the following metals are used for casting:a. Aluminum (ρ = 2.7 g/cm3 ; cost = $1.85/kg)b. Grey Iron (ρ = 6.8 g/cm3; cost = $1.38/kg) Calculate the overall efficiency of the economic conversion of raw materials.
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