If the ground state energy level of a proton in a rigid box is ...

[evelyn o bentley]

If the ground state energy level of a proton in a rigid box is 5.0 MeV, what is the width of the box?
 
  A)
 
  2.7  10-13m
  B)
 
  6.4  10-15m
  C)
 
  2.7  10-15m
  D)
 
  6.4  10-14m
  E)
 
  6.4  10-13m

Question 2

A convex lens has a focal length f. An object is placed between infinity and 2f from the lens on its axis. The image formed is located
 
  A)
 
  at a distance greater than 2f from the lens.
  B)
 
  at 2f.
  C)
 
  between f and 2f.
  D)
 
  at f.
  E)
 
  between the lens and f.

[covalentbond]

Answer to Question 1

B

Answer to Question 2

C

[evelyn o bentley]

Thank you!

[covalentbond]

Always glad to help...