Recent content by robot6

I think they are correct, too, because in equation 4, RBX is positive to the right, RCX is positive to the right, but F2 is pointing towards the left, so it is negative; in equation 5, RBY is positive up, RCY is positive up, but F2 is pointing down, so it is negative as well. i am sorry I...

By the way it is so helpful that you point out that I need to review equations 4 and 5.

Yes, B is origin, which makes it simpler because M is about B.

I finally did get a 6x6 matrix with det=29 so I think I solved it. Thanks to Octave!

Oh the axis for the torque equation is k-hat.

M is an external torque applied (called a "moment" in this notation, from a different country.) Sign for equation 1: RAX points to the right, RBX points to the right, and F points to the right, so all should be positive, in my opinion. How is it incorrect? AH! since they drew M the way I...

OK I have convinced myself that ##M_B## should be removed. Does it make sense, then, that M should appear in both the third and sixth equations, or should it only appear in one of them?

Cool, this I did not know. I thought they were only to 2 micrometers. Looks like it may be 300 nanometers. In any event, the capture is dependent on statistics and sealing. https://www.ph.ucla.edu/epi/bioter/n95masks.html Also, 15 years is not enough to develop cancer from asbestos (at...

Hm. I think that ##M_B## may not exist... because it's accounted for in ##R_{A}, R_{B}, ## and ##R_{C}##.

Speculating... 1. Asbestos generates cancer through the inflammation pathway (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2936775/ ) Note that the inflammation pathway leads to cancer when the source of inflammation cannot be removed by the immune system. This process generally takes decades...

The suspense is killing me. Pun intended...

Yes, most importantly here is to check the units that you are using for R. If you use ##8.314 m^3 Pa K^{-1} mol^{-1}##, for example, then n should be in moles... A good source for various values of R is here: https://en.wikipedia.org/wiki/Gas_constant

I am actually studying mechanical engineering, distance learning program. This actually makes it quite difficult because there is no ability to turn to fellow students. To make it even more interesting, I am completing this in another country in a language which is not English. That's because...

I've drastically simplified the problem for the sake of discussion. The problem is that I end up with six equations and seven unknowns. Let ##R_{AX}## (and similar) be the reaction force at the A node in the rightward direction on the page, and ##R_{AY}## (and similar) be the reaction force at...