When an electric circuit operates, a buzzer makes a sound. what happens to the electric charges in this circuit?

What are similarities and differences between refraction, reflection, diffraction and absorption?

In science and physics what is the standard unit of measure for speed?

Wave functions describe orbitals in a hydrogen atom. each function is characterized by 3 quantum numbers: n, l, and ml. if the value of n = 2: the quantum number l can have values from to . the total number of orbitals possible at the n = 2 energy level is .