Recent content by Pejeu

Per my layman's understanding, the apparent force of gravity, as explained by the general theory of relativity, is actually the result of rectilinear motion at uniform speed through warped spacetime. 1. If that's the case, what actually causes gravity for objects at rest with respect to the...

Wow. I don't know what to say. Except thanks! A lot! :smile:

Sure thing. Here it is : https://drive.google.com/open?id=0BwJaCsyXIqEeME5FTF9pNXVKS1E&authuser=0 Tested it empirically and it seems to be correct. If Maxima or some other CAS were able to do this for me it would spare both the initial work and the need for empirical testing. later edit: I...

There is a solution. And it's quite neat and elegant. The solutions for xD and yD are the equations for the coordinates of the centre of the circle circumscribed to the triangle whose tips are defined by points A (xA, yA), B (xB, yB) and C (xC, yC). K is the radius of the circumscribed circle...

Hello, thank you very much for the insight. That actually never occurred to me. It does churn out stuff if I give it that. However, I can't really make sense of the output. And I can't find the solution I was expecting anywhere in the output. The solution I got was actually pretty neat and...

for: solve([k^2=(xa-xd)^2 + (ya-yd)^2,k^2=(xb-xd)^2 + (yb-yd)^2,k^2=(xc-xd)^2 + (yc-yd)^2],[xd,yd]); the output is simply : [] I want it to solve the system : k2=(xA-xD)2 + (yA-yD)2 k2=(xB-xD)2 + (yB-yD)2 k2=(xC-xD)2 + (yC-yD)2 for xD and yD. I already solved it by hand but wanted to test...

Well, intuitively, you'd want to check the frequency with which each value comes up as well as the range within which values come up, their average (which, after a long enough sequence, should tend toward the middle of the interval within which values come up) as well as their mean (which should...

And how do I go about submitting a proposal of a new type of nosecone geometry I'm pretty sure has not been considered so far so that someone else may study it, test it, appraise it and write a paper on it? I just want someone more knowledgeable and smarter than myself (an complete layman in...

Well their kinetic energy is indeed the same. But it required energy to change their direction of movement. Especially preserving their speed. Are you saying no energy needs to be expended in order to change the direction of movement of a particle with mass, especially if the particle retains...

But the clump is now going the opposite way, regardless that with the same speed as it was going before. So the clump of atoms has to have been first decelerated and then accelerated, at least in the direction described by the tangent it was on half of a revolution before.

Why do things which spin tend to keep spinning in the absence of external forces such as friction with the environment? In order for objects to keep spinning doesn't their periphery (relative to their centre of rotation - which would be their centre of mass, right? - ) have to be constantly...

Many modern inline 4 cylinder engines (especially diesel engines on European makes) employ roller rockers. But these only have a roller in the middle to avoid sliding contact with the camshaft. They slide on the tip of the hydraulic lash adjuster (which has a hemispherical tip) at one end and...

Yet there should be a solution. Isn't this how they do it in the automotive industry? I find it hard to believe they simply allow sliding contact between the rocker and stem. Of course, the cop-out (for me, at least) would be to use a roller at the end of the rocker arm. However, that...

Yes, that's exactly what I want. I want the end of the rocker to roll over the tip of the poppet valve stem instead of sliding against it as it pushes it down. I was fairly sure the required profile is an involute or evolute but I don't have a clear picture of what to do. However I don't want...

of a surface of a part that rotates about a pivot point such that there is rolling instead of sliding contact at the interface between that part, along that curved surface, and another part, with a flat surface against which the first one pushes as it rotates about its pivot. I want to design...