EGR_102_Lab_05A_HW - EGR 102 Introduction to Engineering...

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EGR 102 Introduction to Engineering Modeling Lab 5A Homework Part 1. The ultimate tensile stress of a material is measured in Pascals ( N/m 2 ) in metric units; or in PSI ( lb f /in 2 ) in English units. Write a MATLAB function that takes as input a stress in Pascals, then converts the stress value to psi, and outputs that value. Use the unit conversions: 1 lb f = 4.448 N and 39.370 in = 1 m Test the function twice in the Command Window using 6x10 8 N/m 2 (Aluminum) and 2x10 9 N/m 2 (Steel). Part 2 . The pressure P ( Pa ) of an ideal gas in a container can be calculated from the number of moles of the gas n ( mol ), the volume V ( m 3 ) of the container, and the temperature it is being held at T ( K ) using the equation PV=nRT . The universal gas constant is R = 8.314472 Pa·m 3 /K·mol . The mass of the gas m ( kg ) is related to the number of moles n and the gas’ molar mass M ( kg/mol ) using m = Mn . Five gases have the following molar masses: Gas Type Air Oxygen Helium Nitrogen Water Vapor
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This note was uploaded on 04/23/2011 for the course EGR 102 taught by Professor Hinds during the Spring '09 term at Michigan State University.

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