Answer:
The process of breaking down of heavy nucleus into lighter ones is called nuclear fission.Similarly,the proces of combining lighter nucleus to heavy nucleus is also called nuclear fission.
B. The number of field lines on the source charge.
It is an example of liquid. if thats what you are asking for...
Answer:
The change in internal energy of the system is -17746.78 J
Explanation:
Given that,
Pressure 
Remove heat 
Radius = 0.272 m
Distance d = 0.163 m
We need to calculate the internal energy
Using thermodynamics first equation
...(I)
Where, dU = internal energy
Q = heat
W = work done
Put the value of W in equation (I)

Where, W = PdV
Put the value in the equation


Hence, The change in internal energy of the system is -17746.78 J