Recent content by turpy

Hi Chet, Thanks for the response. That covers the linear elastic region of the shear stress-shear strain curve, but what about the plastic region?

Homework Statement For a crystalline metal material - Elastic modulus E - Poisson ratio v - A table with test data of stresses vs. total strains, from a monotonic uniaxial tension test, which generates a stress-strain curve. How would you use this data to find the corresponding pure shear...

Works out great, thanks! I just wonder how I would ever think to assume that solution form without being given the solution first...

Homework Statement (x2)d2y/dx2 + 2*x*(dy/dx) + w2*x2*y=0 Where w is a constant Homework Equations The Attempt at a Solution I am having a really hard time figuring out how to solve this. Usually for second order linear ODEs I start with assuming a solution of form y=eλx...

Hopefully it's ok if I post two questions QUESTION 1 Homework Statement Homework Equations Node voltage analysis method The Attempt at a Solution First of all is this circuit equivalent? (combining the 10 ohm and 4 ohm in parallel, and extending the ends of the protruding 10...

I get it now! I just wonder why the professor assigned this question before node voltage analysis was covered. Thank you so much for your help!

Can you explain how you got the first term? Why are the 4 ohm and 1 ohm resistors summed in the denominator (are you treating them as resistors in series?) I just learned about node voltage analysis in class a few hours ago; is this a method similar to that?

So it's 70V? woah I couldn't imagine the voltage across anything in this circuit to be greater than the source voltage. But I guess it's possible since the current source produces voltage to keep the 2A constantly flowing?!

Oh thank you! I didn't realize a current source was producing voltage to maintain a specific current. (subscripts for resistors using their resistances) Using KCL for the junction the 2A flows into: 2 + i_1 - i_5 = 0 KCL at junction below the 5 ohm resistor i_5 - i_1 - i_10 = 0 i_10 = i_5...

Homework Statement Determine the voltage across the 2A current source Homework Equations kirchhoff voltage law (kvl) kirchhoff current law (kcl) ohm's law The Attempt at a Solution I'm new to the concept of a current source. I'm not sure how there can be voltage drop across the...

OH! thank you so much i get it now now i have arcsin theta = (10sin10)/200 theta = 0.497 south of east, which is the correct answer a simple question but i totally misinterpreted what "airspeed" meant

Homework Statement A plane has an airspeed of 200 mph. The pilot wishes to reach a destination 600 mi due east, but a wind is blowing at 10.0 mph in the direction 10.0 degrees north of east. In what direction must the pilot head the plane in order to reach her destination? ______________...