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

Describe the function of the endomembrane system? what organelles are involved?

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?