An electron is accelerated through
a potential difference of 2000 v and then it enters a
uniform magnetic field of 0.02 tesla in a direction
perpendicular to it. find the radius of the path of the
electron in the magnetic field.

Abeam of electrons with of wavelength of 7.5 x 10-6 m is incident on a pair of narrow rectangular slits separated by 0.75 mm. the resulting interference pattern is projected onto a screen 10.0 m from the slits. what is the separation of the interference maxima in the resulting interference pattern?

Write the function getkthdigit(n, k) that takes a possibly-negative int n and a non-negative int k, and returns the kth digit of n, starting from 0, counting from the right

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?