An atom in normal conditions refers when electrons are in the fundamental state. When you leave the atom, an electron absorbs energy from an external source and moves to a higher energy state.
Energy states or energy levels are called orbitals. The difference between the energy states in an atom is responsible for the emission of photons when an electron transition occurs between these two energy states.
Because the energy levels are discrete, the emitted photons also possess different energies.
Assuming this coin is on earth and that it wasn’t dropped forcefully:
Use the formula d = 1/2at^2. Rewriting using a=g and solving for height h gets us h = 1/2(9.8)t^2.
In this case that would get that the change in height h is 0.5(9.8)(0.3^2) = 0.441 m.
The prefix uni- which means “one” is an important prefix in the English language.
If a man's mass is 80 kg, then ...
-- He weighs 258 newtons on Mars.
-- He weighs 785 newtons (about 176.4 pounds) on Earth.
-- He weighs 130 newtons on the Moon.
-- He weighs different amounts in other different places.
His mass doesn't change. It's 80 kg no matter where he goes.