What is the potential energy of the 450 kg glass on the 18 m high desk?

absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas.

emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.

explanation:

i need with 1.3.2 investigate cycling o2 and co2 apex

we need to see it

answercollision;