Dihydrogen monoxide is one of the scientific names of water having the formula H2O, where H2 "dihydrogen" is a double hydrogen (Latin Hydrogenium — hydrogen), and O is "monoxide" (oxygen).
Answer: P represents electrical energy, Q represents thermal energy.
Explanation: The toaster takes electrical energy from the electrical socket through wires and converts that into thermal energy that heats up/toasts the bread.
