Ok, so I know that this is easy but for some reason I am confused. Thank you!

Which subatomic particle has a negative charge

If you visited mount shasta city (elevation 900 m [3000 ft.]) and found the outside air temperature to be 27°c (81°f), what would be the air temperature at the summit of mount shasta (elevation 4200 m [14,000 ft.]) at that moment-assuming that the temperature conditions with altitude change at an average, or normal, lapse rate?

The energy of a photon is equal to (what) times (what) of the photon.