Answer:
physical properties of gases, that is, pressure, volume, temperature, and amount of gas
<span>acceleration I think.</span>
Based upon Max Planck's theory of black-body radiation, Einstein theorized that the energy in each quantum of light was equal to the frequency multiplied by a constant, later called Planck's constant. A photon above a threshold frequency has the required energy to eject a single electron, creating the observed effect.
