Aproton is in an electric field and has an electric potential energy of 0.5 j. what is the electric potential (voltage) that it experiences?
could someone explain what i did incorrectly?

a) 3.1 e-19 v < i chose this answer originally
b) 1.6 e-19 v
c) 3.1 e18 v < i'm pretty sure this is the correct answer?
d) 0.5 v
e) 2.0 v

On a hot saturday morning while people are working inside, the air conditioner keeps the temperature inside the building at 22degreesc. at noon the air conditioner is turned off, and the people go home. the temperature outside is a constant 33degreesc for the rest of the afternoon. if the time constant for the building is 4 hr, what will be the temperature inside the building at 4 : 00 font size decreased by 2 upper p . font size decreased by 2 upper m .? at 6 : 00 font size decreased by 2 upper p . font size decreased by 2 upper m .? when will the temperature inside the building reach 24degreesc? 324281