The physical substance that
everything is made of.

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?

You have 80 g of 60oc water and 80 g or 10oc water. what is the final temperature when the two are mixed? explain.