# Recent content by garytse86

thanks cabraham. berkeman, it beats me - this is why I asked :S
2. ### Testing gradient against a value

Homework Statement I have 25 pairs of values. I have a gradient and want to test if this gradient is significantly different from 1. Which stats test do I use? I thought of using a one-sample t-test, but how are you meant to put 25 gradients in the test!??? thanks...

how do they improve high-frequency transmission (and not low-frequency?) ? I'm a biologist... Thanks
4. ### Mass moment of inertia of an irregular area

Hi. Please help. I'm struggling to find the mass moment of inertia of an area. Please see picture. I already have the centroid of the area, and the exact area. How would I find the mass moment of inertia of this area about its centroid? I tried using AutoCAD, but it gives you the...
5. ### MathCAD - separation of real and imaginary parts of a complex variable

yeah but it doesn't work to separate out the components...
6. ### MathCAD - separation of real and imaginary parts of a complex variable

Hi guys, just wondering whether you could help. I've got a complex number in terms of a lot of variables, and need to separate it into its real and imaginary parts. How do I do that? I spent past hour trying to look for tutorials, unfortunately none tells you how to do it...
7. ### Bag of coffee bean

Recently I bought a bag of coffee beans from abroad on a plane, now the bag is very inflated. I want to take the bag on a plane again, would it burst?
8. ### Irreducible complexities

actually I've got some ideas but have work for tomorrow.. will post later
9. ### Irreducible complexities

we had a lecture on intelligent design (or should I say - one against ID). the lecturer went into great detail as to how some complex systems that are apparently irredicubly complex can actually be taken apart, and the system still works. e.g. the blood clotting system. what I don't...
10. ### Donnan Equation

here is the Q, can't do the chloride part.
11. ### Donnan Equation

I don't have the relative permeabilities.
12. ### Donnan Equation

How do you adapt the Donnan Equation to 3 difffusible ions?
13. ### Medical Chemical and Electrical transmission

Yes but we are discussing one individual muscle fibre which is only innervated by one nerve?
14. ### Medical Chemical and Electrical transmission

Are you talking about tetanus of muscle contraction, so higher frequency allows maximum tension to increase because muscles are stimulated before they fully relax? can you clarify ths bit please?
15. ### Medical Chemical and Electrical transmission

BUT: a neuromuscular junction is an atypical chemical synapse:it is much simpler, with only one postsynaptic receptor type, only excitatory signals, and often endplate potentials are suprathreshold so 1AP => 1 contraction. therefore what you've argued does not apply to the neuromuscular junction?