Several questions - 5-Three galaxies are aligned along an axis in order A, B, C. An observer in galaxy B is in the middle and observes that galaxies A and C are moving in opposite directions away from him, both with speeds 0.59c. What are the speeds of galaxies B and C as observed by someone in galaxy A? c (galaxy B) c (galaxy C) 6-A spacecraft traveling out of the solar system at a spe...

What minimum barrier thickness is there no reflection? - I have a test coming up and I was told I need to know how to work out a problem like this: Suppose electrons with E= 13.0 eV approach a potential barrier of height 6.0 eV. For what minimum barrier thickness is there no reflection? For what minimum barrier thickness is the reflection a maximum?

What is the probability that the electron will tunnel through a barrier? - An electron is accelerated through potential difference of 3eV and is incident on a finite potential barrier of height 5eV and thickness 5x 10^-10m. What is the probability that the electron will tunnel though the barrier. I am not 100 percent sure how to do this so a detailed solution would be helpful.

Values of the radius - Find the lesser and greater values of the radius where the n = 2, l = 0 radial probability density has its maximum values.

Probability of an electron - Calculate the probability of an electron in the ground state of the hydrogen atom being inside the region of the proton. (For purposes of calculation, use a proton radius r = 0.990 10-15 m.)