Recent content by ZachN

Yeah, you're correct, quasi-linear hyperbolic PDE. The reason the "compatibility equation" is needed is that the governing relations for the particular flow-field are PDEs, they need to be reduced to total differential equations. The characteristics are the paths of a physical disturbance, in...

Well, I'm learning this from a section in Gas Dynamics by Zucrow. It only presents one method... It says to find the characteristic from \frac{dy}{dx} = \frac{b}{a}. In this case a = u, b = 1, c = -u. So, \frac{dy}{dx} = \frac{1}{u}, integrating yields uy=x+c1 or y=\frac{x+c_{1}}{u}...

Hello! I am trying to solve... u*ux + uy -u = 0 with i.c. u(x,0) = x +10 Determine: a.) characteristic equation b.) compatibility equation c.) value at u(5,10) I've tried the general method of determining the characteristic equation dy/dx=b/a and attempted...

No one can offer even a suggestion? Maybe my code is a bit confusing.

Homework Statement Not a homework just self-teaching. I want to write a program which determines the round-off error of a number. Homework Equations re = Abs(x-x*)<= 0.5x10(n-2) x*-0.5x10(n-2) < x < x* + 0.5x10(n-2) The Attempt at a Solution #include <iostream> #include...

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Yes, a Concentration (of varying concentration - a density gradient) of virtual particles. So all matter and energy is just our collective conscious agreeing that something of such and such form is "here" or "there". This is metaphysics.

Well, I agree with you all then. All I am saying is that a vast majority of physicists don't recognize an ether-like medium at all - they just think "space-time". I agree that Einstein did not intend to do away with a medium but that his work has accomplished that accidentally. Looks like an...

Agreed. It may very well be energy. But it isn't "nothing" - as in an absolute vacuum or some abstract notion of space and time - it must be comprised of something or be represented by something. But go talk to engineering and physics students at any level and I will bet you that they do not...

Exactly, I agree... this is the problem in physics today. Einstein, I believe has set physics back 100 years not because what he developed is wrong but because it has gotten everyone else lost. It is impossible that a thing called space-time is affected by matter if space-time is actually...

Proportional to the velocity was just an example.

The true nature of the constant is that it is there to make up for a lack of understanding for the true mechanism for gravity. Constants are used to express values we can't explain through other means. That is the dirty secret of science. e.g. - the resistance(drag) of an object falling...

Time dilation occurs because we are observing things in one reference frame from another reference frame. We can ramble on about whether or not this is is accelerating or that is accelerating but it just comes down to basic idea of reference frames - time isn't really "changing". We are just...

I don't want to argue about it cause I came here for help but a moment is directly related to acceleration. There can be no moment without an acceleration. A moment requires a force and a force is mass times acceleration. The moment about an axis M = r (length of moment arm) cross F (or times...

In order for there to be a moment there is velocity and acceleration - so it must be able to be expressed in terms of angular or linear velocity. Are you guys saying I have the right answer.