The mean field approximation predicts that the average magnetization m is determined by where z is the number of nearest neighbors. (a) find the critical temperature te (b) show that the critical exponent for the magnetization is 1/2 .. (c) show that the internal energy is give by where n is the number of spins. (d) find the energy at b = 0 and t = 0, compare the result with the exact value. (e) find the energy for t > 「. is the result realistic?

d is the answer i came up with

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me