Recent content by brhmechanic

It really depends on how much dead load needs to be supported, and what/how live loads would affect the structure. For example, if you were testing concrete columns with a fixed width/cross-section, taller columns will likely buckle, and shorter columns will likely develop spalding under too...

Some courses may not need them, but certain math, engineering, and science courses use specialized programs, such as Mathematica or AutoCAD/Autodesk, which may not be available in campus computer labs.

I could maybe see high speed freight transportation as a successor to long distance highway travel, sort of like a high speed boat ferry... but without the boat and the water. But for small distances, is it really practical for high-speed above-ground traffic with the possibility of pedestrians...

Yeah, these are good points, but we still have to keep in mind that this will not happen for quite a while because the costs associated with researching, designing, producing, and marketing this kind of car are still going to be pretty high.

Have you tried Wolfram Alpha? I know that it's a pretty common site for most people on this site, but it would certainly give you some ideas. I hope this helps.

On the graph of a function, such as y=x^2, if you want to find the average slope between two points, you basically choose 2 points and use the basic slope formula to find the secant line. Well, if those 2 points are an infinitely small distance from each other, it forms a tangent line, which is...

If you are still having trouble, try to solve node G using these: G[y]=0= -20 + EG[y] and G[x]=0= -20 + FG + EG[x]. Then it should be easy enough to start working your way down.