Can an object have mechanical energy without having momentum?

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 .

What is the role of lenses in microscopy?

What component of earth’s atmosphere exists entirely as a result of photosynthesis?