Recent content by ultraviolent

Thanks, I understand now :)

Can anyone give me an explanation of why a marble dropped into a swimming pool will fall faster than if you drop a marble into a water filled tube with a diameter only slightly larger than the marble itself (presume it doesn't touch the walls of the tube). It's something to do with how quickly...

Thanks Chris that was really interesting :) A lot of that would have been good to include in my report, it's a pity you didn't reply before as I handed in my coursework last week. If you're interested I’ll let you have a copy of my coursework. I found the whole project really fascinating...

Argh, I think I was pretty tired last night when I did that! Thanks Gokul43201 and everyone else for your help :smile:

Artman thank you so much! :biggrin: Last little problem for you lot and then i'll be off :smile: "To convert PSI to Pascals, first convert to millibars and then multiply by 100 since 1 millibar is 100 pascals." 1 Psi = 68.948 mB 130x10^6 x 68.948 = 8963240000 mB 1 millibar =...

Ah yeh... I've just spotted what could be the reason your calculations didn't work. The data on the course CD rom shows that the max strain of yew wood is 0.9%, but that pdf document shows it as 0.3%. Going through your calculations again gives me a value of 1.08 MJ/m^2 for strain energy...

What you worked out seems to make sense, but seeing as Young's Modulus is a measure of stiffness, and all the info I can find about Yew wood says it has a low stiffness, I am now not really sure... I'm starting to run out of ideas as to how I can proceed with this project. Does anyone know...

Thank you both for your prompt reply. NateTG, do you know how long ago that was? I've searched the Scientific American website and I can't seem to find any reference to that article. Gokul43201 - the .pdf document that you gave me a link too is exactly what I’ve found before, just in many...

Hi everyone, As part of my AS level physics coursework I’ve decided to produce a report on the physics behind why yew wood was used to create longbows. The problem I’m having is that because yew wood is no longer used in modern engineering so no reference books at my local university library...

I already managed to do the first part, but how would you use the equation derived from this to calculate the points half the length of the diagonal from the midpoint?

Hi everyone. This is a question that was attempted in class but no on (including our teacher) could solve in the time we had left. It's not actually homework, but it's really getting on my nerves! The quadrilateral ABCD, where A is (4,5) and C is (3, -2), is a square. Find the coordinates of...

Yes, thanks for the reply, I now have some idea what hypercharge and isospin are, but I didn’t understand much else :) I’m sure it will be useful to me in the future Going back to suyver's question "can an electron emit/absorb a tauon neutrino? why/why not?" I've found some information...

A. an up quark B. an anti up quark C. a down quark D. an anti down quark E. an electron Can I get back to you on that? Does this mean they have three colours, they can have one of the three colours at any point, or that it's predefined what colour charge a quark has? Was this...

I think so, an anti charm and an anti top quark? Because it's not one of the 5 possible answers I'm going to assume it's because they have greater mass, and mass is only another form of energy so it would require more energy from the gluon? That would be the format of the question...

Does the conservation of electric charge imply that the electric charge the gluon + up quark + unknown = 0 As; Up quark: + 2/3 Down quark: -1/3 Gluon: 0 This means the equation becomes -2/3 + 2/3 + 0 = 0 The only object with an electric charge of -2/3 is an anti up quark, so this...