Author Question: A proton falls through a potential drop of 400 V. How much is the change of potential energy of this ... (Read 57 times)

abern · **on:** Jul 29, 2018

A proton falls through a potential drop of 400 V. How much is the change of potential energy of this proton in falling through this potential drop?

A) 6.4 10-16 J
B) -6.4 10-16 J
C) 17 10-16 J
D) -4000 J
E) 4000 J

Question 2

Which of the following is the correct equation for the momentum of a photon?

A) p = (hc)/
B) p = /c
C) p = (hc)/f
D) p = (hf)/c
E) p = (h)/c