Explain how machines can be useful if the output work is always less than the input work. how can machines be useful if the output work is always less than the input work?

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Aballet student who learns with the of his instructor is demonstrating learning.

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 .