Some energy transfers are useful, but others are not. Energy can be a difficult idea to understand because we can’t see energy itself. One way we can understand energy is to use money as a model.

And different systems store and transfer energy differently. JAMES: Energy is also transferred through work done. We cover work done in much more detail in our Bitesize Physics ‘forces’ series ...

Quantum technologies operate by leveraging various quantum mechanical effects, including entanglement. Entanglement occurs ...

Quantum mechanics is therefore central to understanding the first steps of energy transfer and charge separation." This process, which cannot be understood satisfactorily by classical physics ...