Recent content by sombrancelha

That's what I have to prove. There are no premisses.

Homework Statement I've started studying natural deduction recently and I have to prove (p implies q) or (q implies r) Homework Equations -- The Attempt at a Solution I thought about using the Law of Excluded Middle, but I'm not sure.

Homework Statement Near the critical point, Gibbs free energy of a ferromagnetic system can be written as (1). a)Using the definition of magnetization, (2), show that m(t,H=0) = Bt^{\beta} B is a constant. Determine \beta in relation to \alpha and \Delta b) Show that the...

Hello everyone, I've been looking for some information on superelastic collisions on the Internet, but I haven't found any site that explains how it happens or why it happens. Could someone please explain me (or post a link to a website that does)? Thanks a lot, Sombrancelha

Thanks; Could you explain to me a bit better? I'm still at High School, so I don't have the knowledge I wish I had in Physics. What are piezo crystals and oscilloscopes? What do they do/measure? Something else, correct me if I'm wrong, but in your proposal, I wouldn't use light. But I have to...

Thanks for the answer, but i think that there might be some relation. The thing is, I've got a problem in which I have to use light to measure the speed of sound in liquids. Measuring the speed of light wouldn't be a problem, so I thought that there was some mathematical relation between them...

Hello everyone, I was wondering if there is any relation between the light and the sound speed in a liquid. For example, light speed/sound speed = constant, or something like that... Thanks