Question

Electromagnetic Force and Strong Force An atomic nucleus contains two types of particles: protons and neutrons. Neutrons have no charge, while protons have a positive charge of 1.6 \times 10−19 C. All nucleons interact via the attractive strong force. To hold the nucleus together, the strong force must overcome the Coulomb repulsion of the protons in the nucleus. (a) A helium-4 nucleus (\alpha particle) contains two neutrons and two protons. It has a radius of about 2 \times 10−15 m. Estimate the electrostatic potential energy of the two protons. (b) The nuclear binding energy of the \alpha particle includes contributions from the attractive strong interaction of protons and neutrons as well as the repulsive electrostatic interaction of the protons. To get some idea of the relative importance of the two interactions, calculate the ratio of the energy you found in part (a) to the nuclear binding energy of the 4 2He nucleus.

          Electromagnetic Force and Strong Force
An atomic nucleus contains two types of particles: protons and neutrons. Neutrons have no charge, while protons have
a positive charge of 1.6 \times  10−19 C. All nucleons interact via the attractive strong force. To hold the nucleus together, the
strong force must overcome the Coulomb repulsion of the protons in the nucleus.
(a) A helium-4 nucleus (\alpha  particle) contains two neutrons and two protons. It has a radius of about 2 \times  10−15 m.
Estimate the electrostatic potential energy of the two protons.
(b) The nuclear binding energy of the \alpha  particle includes contributions from the attractive strong interaction of protons
and neutrons as well as the repulsive electrostatic interaction of the protons. To get some idea of the relative
importance of the two interactions, calculate the ratio of the energy you found in part (a) to the nuclear binding
energy of the 4
2He nucleus.

Added by Brenda F.

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