When you set something down on the ground what kind of work is your arm doing

You are about to open a container of soy milk but notice that there are instructions to “shake well before serving.” the soy milk is most likely a

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?