Recent content by LFS

This is a chicken/egg question: parabolic or navier-stokes? I "read/know" that the velocity profile for laminar flow is parabolic with v=vmax as maximum and v=0 on the edges let us say D=2d. Mathematically I immediately say: the equation of such a parabola is v=vmax•(1-x²/d²) for xε[-d,d]...

Homework Statement My son was given a proof of Pascal's Law and told to learn it for his course in Fluid Mechanics. a. It was done with a prism. I cannot type in a link, but google: pascal law prism and pick the first link and scroll down half a page to pressure and you will see this proof. b...

Hiya TinyTim, I am sure you are absolutely correct that the area moment of inertia Ic depends only on shape. However, "area moment of inertia" is just 4 words to me (no physical meaning). Meanwhile, I did find the integral formula for computing the center of pressure (Fox) and calculated it...

Hiya Tiny Thank-you for your response. Those were exactly the links I was going to put in (but wasn't allowed). The reason I ask is that the centroid of a triangle is 1/3 of the height measured FROM the base (i.e. from the weighted position of the triangle). So the (depth of the) centroid...

Homework Statement A inverted isosceles triangle gate with height a=3ft and base b=2ft is 6ft under the water (top of the inverted triangle). Find the Force on the gate and hp (the depth of the) center of pressure. Homework Equations hc= depth to gate + depth to centroid= 6+(1/3)•3= 6+1 =...

1. I am a mathematician trying to understand a physics experiment where an aluminum rod is held in the middle and struck with a mallet. The rod is then placed next to a microphone, the sound recorded and the frequency determined using Audacity. Working backwards, one determines the speed of...

Thanks and links fixed Thanks dontdisturbmycircles for the kind words about the mathcasts and thanks minase for noticing the dead links - which hopefully are now fixed! LFS