Here's the question you clicked on:
ggrree
http://gyazo.com/ae831c4c7ae3325cfce6f280cfa37b88 Thermodynamics question. It's asking us to show that this is true.
Google how they proved it with experiments:P
no lol. You can do this with the definitions of the state functions and partial derivatives. dU = TdS - PdV etc etc
btw do you know anytinhg about this formulae for waves? c2 = (fy)2 = F / md
c = velocity of light f = frequency y = wavelength F = Force = constant (ka) by amplitude (x) = kax md = mass density = mass (m) / wavelength (y) = m / y Let us assume that amplitude is proportional to wavelength F = kax = kwy Energy (E) = force (kwy) by distance (y) thus; E = kwy2
I it's suppose to be able to deduce E=hf and E=mc^2 and F=ma or is this jsut some bull i found on the web O.o?