Recent content by ttran1117

Homework Statement For the machine element shown, locate the x coordinate of the center of gravity. The picture of 2 different problems are attached Homework Equations V = 1/3*a*b*h The Attempt at a Solution I can figure out the coordinates fine for everything except the triangles...

That's just how the problem is given. I am totally lost, and what's worse is, the rest of the homework problems I have to do builds on top of this. I been at this for the past 2 hours and I keep running into 2 unknowns. Can anyone please provide a solution for this? Thanks

Homework Statement A battery has an emf E and an internal resistance r. IT is connected to an external resistor R. When R=4 ohms, the potential difference is 9.5 V. When R = 6 ohms, the potential difference is 10.0 V Homework Equations The Attempt at a Solution Rtotal = R + r I =...

Homework Statement A current of 200 mA flows in a silver wire of radius 0.8mm. Find (a) the drift speed of the electrons. (b) the number density of particles. Homework Equations The Attempt at a Solution The answer in the book is 1.07 x 10^-5, but I'm getting 1.06 x 10^-4. Can anyone tell me...

Oh! I finally get it now lol. thank you

You're right. That is supposed to be the right equation, but I just used x and y because I didn't understand how to use the symbols lol. I was/am browsing through my textbook and notes, but was unable to find to relate rho, phi, and theta to spherical coordinates. I understand that x^2 + y^2 and...

Homework Statement Put the equation: p = 2 sin (x) cos (y) into rectangular coordinates. Identify the surface The Attempt at a Solution I tried to look at all the identities but I can't seem to figure out which one to use. I have the solutions to this problem, which follows: p^2 = 2...