Answer:
The answer is 
Explanation:
The amount of energy is not enough to apply the relativistic formula of energy
, so the definition of energy in this case is
.
From the last equation,

where

and the mass of the neutron is
.
Then

the equivalent of
the speed of light.
The correct answer is d) 200 lbs.
Hope that I was of help.
Answer:
b
Explanation:
because the metalloids are the thing in the middle