Recent content by Vidatu

Thanks, I got pretty good answers for those two now, just needed to prodded in the right direction. As an FYI for anyone interested, I found some good info on this wiki page http://en.wikipedia.org/wiki/Vortex-induced_vibration. We were introduced to vortex shedding, but never learned about...

We did a lab where we dropped three spheres into two different fluids, measured their velocities, and found drag coefficients. We were also asked some theory questions, and these are what I need help with. Spheres: 3.175 mm, 0.05 g Teflon 6.35 mm, 0.375 g, aluminum 12.7 mm, 8.36 g, steel...

Homework Statement Oil flowing through a pipe, measured to be 135kPa 15m from the end and 88kPa discharging from the end. The diameter of the pipe is 1.5cm, the density of the oil is 876kg/m^3, and the dynamic viscosity is 0.24kg/m*s. Find flow rate for: a) horizontal b) inclined 8...

Its a suggested problem for our class; a learning exercise, not for marks. I'm pretty sure I've got part a, but b is still eluding me. For the record, we were never taught the wave equation before; it was part of a prerequisite course, but was cut out, and this course wasn't altered to...

Problem: Applied Partial Differential Equations (Richard Heberman) 4ed. #12.3.6 Consider the three dimensional wave equation \partial^{2}u/\partial t^2 = c^2\nabla^2 u Assume the solution is spherically symetric, so that \nabla^2 u =...

Using a more precise machine? A larger number of specimens? Different measuring apparatuses? Give us some sort of a lead here...

Hmm. I think I may have been really, really stupid with this. Anyone who wants a good laugh at me, look at my calculations again. Yeah, I really thought, after writing that out and typing it in that that negative was a positive. And that two negatives make another negative. Wow, go me. In any...

No help at all?

Anyone able to help with this?

As I said, write out the full formula. You will see that the masses cancel, leaving just the accelerations. Your calculations appear to be correct to me.

Really simple question about mirrors Homework Statement Where must you place an object in front of a concave mirror with radius R so that the image is erect and 2.5 times the size of the object? Where is the image? Homework Equations 1/s + 1/s' = 2/R m = h'/h = -s'/s The Attempt...

Substitute the formulas for Fk and Fn into the formula for \mu

Its been a while since I did one like this, but I don't think yo should use the relative speed like that. You have the bird accelerating massively, which is impossible. I'd say its more like (0.3kg)(6m/s)-(0.01kg)(30m/s)

this is what he meant by a right triangle. Use cos(\theta) = adjacent/hypotenuse to find x. Then, to find how high the child has risen, subtract x from 2m.

Check the formula again.