Meg lifted a box of books with a mass of 20 kg from the floor to a shelf 1.4 m off the ground. the applied force was equal to the weight of the box of books. how much work did meg do?

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:

the temperature and the pressure affect solubility. temperature affects by changing the properties of the solvent. the increase in pressure increases solubility, the decrease in pressure decreases solubility.