All of the orbitals in a given subshell have the same value of the quantum number.

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?