Recent content by kwuk

Homework Statement Determine which gives the higher efficiency of a Carnot engine, increasing the temperature of the hot reservoir, or decreasing the temperature of the cold reservoir by the same amount. Justify your answer carefully. Homework Equations (TH-TC)/TH)The Attempt at a Solution By...

Hi, I have been given the following problem; If an electron is confined to a 1-D potential well of infinite barrier height and width L, the normalized wavefunction Psi(x) of the electron in the various quantized states, n, is given as Psin(x)=(2/L)0.5 sin(n pi x / L). For the n=2 state...

Hi all, would be very grateful if someone could give me some pointers on this. If you have two particles of equal rest mass traveling in the same direction, particle A traveling at say 0.5c and particle B behind it traveling at 0.6c and they eventually collide inelastically, how do you...

Homework Statement The nth term of an arithmetic series is 1/2(3-n). What are the first three terms and the 20th term? Homework Equations nth term = a+(n-1)d The Attempt at a Solution I have made various attempts but cannot seem to work out how this can be done without a...

Hi. I know this is a pretty basic principle, however I'm fairly new to the subject and was wondering if anyone is able to give a brief 'layman' explanation of why, as Planck's law states, at lower wavelengths the blackbody radiation falls to zero rather than continuing to climb as stated in the...