1. Fill in the blanks. Distance of separation

Question

The figure shows the potential energy of a pair of nuclear particles and their distance of separation in Fermi (fm).

1. Fill in the blanks.

Distance of separation	Potential energy	Nuclear force
r>3 fm
r0 <r<3 fm		Nuclear force is attractive
r<r0	Potential energy positive

2. What conclusion do you obtain about the nature of nuclear force from the graph

Answer 1

1.

Distance of separation	Potential energy	Nuclear force
r>3 fm	Potential energy very small and negative	No nuclear force
r0 <r<3 fm	Potential energy is negative	Nuclear force is attractive
r<r0	Potential energy positive	Nuclear force is repulsive

2. The nuclear force is a short range force.