Recent content by fatoomch

sorry if I'm not clear on this. If A=pi r^2 then A is proportional to r^2 and you could draw a straight line graph of A against r^2 so if y = 85x^-1 wouldn't y be proportional to the inverse of x?... you could plot a straight line graph of y against the inverse of x?

Hi, If I have a curved line of, say, y=85x^(-1) could I say that y is proportional to 1 over x?... and use this to draw a straight line graph? Thanks

Would I be correct in saying "Material stiffness - the ability of a material to resist bending when subject to compressive AND tensile forces"... especially the last bit. Thanks in advance.

ok thanks... so when it states '12v' it just means this bulb will work best (last longer) and is specifically designed for a 12v supply? ...And if it IS connected to 24v supply it will consume 72watts of power?

Dumb question, I know. But what exactly does it mean? Does it mean 36watts is what a bulb will consume at 12v?.. And does '12v' mean that the bulb will only work at 12v. What if you connect the bulb to a 24v supply? Please excuse my ignorance.

To be honest, not really sure about the phrase 'pure energy' Studying A Level Physics at the moment and I stumbled upon this article. From http://science.nasa.gov/headlines/y2000/ast29may_1m.htm May 29, 2000 -- What do you think of when you hear the word "antimatter?" Something exotic...

Would I be right in saying that the two are transferred to pure energy?

Photons have energy but zero mass?? hi, Apologies if this is in the wrong message board. Photons have zero mass. If E=mc^2 then m = 0. So how can photons have energy? Does this have anything to do with E=mc^2 only applying to matter at rest? thanks