A nucleon is A) a neutron or a proton. B) a nucleus ...

[melina_rosy]

A nucleon is
 
  A)
 
  a neutron or a proton.
  B)
 
  a nucleus made of neutrons only.
  C)
 
  a neutron or proton when in the nucleus.
  D)
 
  a neutron, proton, or positron when in the nucleus.
  E)
 
  a neutron or positron when in the nucleus.

Question 2

An electron undergoes a collision with a proton. In the center of mass system, the energy of the electron is 4000 MeV. What is the energy of the electron in the lab system, where the proton is at rest before the collision?
 
  A)
 
  34 GeV
  B)
 
  37 GeV
  C)
 
  40 GeV
  D)
 
  43 GeV
  E)
 
  46 GeV
  F)
 
  52 GeV

[efwsefaw]

Answer to Question 1

C

Answer to Question 2

A

[melina_rosy]

Thanks for the timely response, appreciate it

[Joy Chen]

Great answer, keep it coming