Recent content by tuoni

Very off-topic In an era of gaming where Call Of Duty -- and similar, arcady games -- seems to be the height of gaming, my models and focus on "ultrarealism" would indeed seem wasteful and redundant. I have two projects that I'm working on, very different, but both sharing the same idea of...

Thank you! I was looking into these chaperon, or helper, proteins to see if I could make some progress there. I think this simple model will work very well! It will take some experimentation, additional research, and with a little work I might be able to fit it into a unified model...but as a...

I never exepected it to be that simple, but I was hoping of finding a simple solution for it. I am working on a computer game, and this would be part of the "injury & disease" model. I have already spent 4 years learning ballistics, going from knowing nothing (except the ubiquitous cannon ball...

Destruction of tissue, heating and heat transfer Are there any references available for the energy required to destroy tissue (or different types of tissue)? I have been told that it is related to the energy required to break the bonds of the proteins in the cells, but I have not found any...

I had to look into that a little, and it does seem interesting, but I haven't been able to find any real examples/experiments/equations, so unfortunately I won't be able to use it. Good to know about the momentum integral theorem, but I doubt I'll be able to use it myself in the near future...

That depends on the amount of water you have. In this case, the U-shaped tube, the area is identical for both, so it only depends on the height of each column. If identical, it would be over 28,000 times the normal atmospheric pressure. If the water column was twice as high, it would be double...

Assuming a gravitational frame of reference, you would need to equate the pressure of the air and water column. p_{air} = p_{water} \left( \frac{F}{A} \right)_{air} = \left( \frac{F}{A} \right)_{water} a_{g} \left( \frac{m}{A} \right)_{air} = a_{g} \left( \frac{m}{A} \right)_{water} a_{g}...

I don't think it's really a matter of pressure, but density. So for a wooden ball to float in air as it would in water, you would have to compress air (according to the ideal gas law) until it reaches the same density as water. p = \rho \cdot \frac{RT}{M} p -- pressure (Pa) ρ -- density...

I have made decent progress with my ballistics model, but I have run into trouble and I'm not quite sure how to solve it. This particular problem deals with penetration and tensile cavitation. Based on the Held equation for cavitation in jet penetration (still haven't found any sites discussing...

Great! Thank you very much for the help! I've been going through the equations plenty of times and made it work for all the other shapes and forms as well. It also works in octave and mathcad. I also managed to work out moment of inertia now, and a few other things. Thanks a lot!

Heh, nothing is that easy when you barely grasp the basics of it :) So often do I regret not taking advanced maths in college, didn't seem useful at the moment, but damn could I have used it later on! So far I've learned what little I know from the few practical examples I've found and a few...

Had to do a little searching to make sure I got this right; so for a general body with homogeneous density the centre of mass is equal to its centroid? ...and the formula I found for this is: C = \frac{\int xg(x) \delta x}{\int g(x) \delta x} The old and tried formula: R = \frac{\sum...

Hmm...as it is an axisymmetric body, only sy is non-zero, and as it is also has homogeneous density and continuous distribution, I thought it was: R = \frac{1}{m} \int{\rho(r) r \;\; \delta V}

Thanks for the help! I always use wolfram alpha (always get it wrong when I try it manually) so could you give me the intermediate steps (or the essential ones)? What did you integrate to get final definite equation? I am making generic formulas for finding volume, centre of mass, angular...

I am trying to find the centre of mass of a projectile nose. I profoundly suck at integration, but I have managed to work out area, and now I'm battling centre of mass. Am I doing this correctly? Is my final integral correct? x = \sqrt{r_{1}^{2} - y^{2}} - (r_{1} - s_{2}) \int{x \;\delta y} =...