Modern Physics

Which of the following forces is primarily responsible for holding protons and neutrons together within the nucleus of an atom?

How does the strong force change as the distance between nucleons increases?

In a nuclear reaction, a proton transforms into a neutron. What happens to the total number of nucleons (protons + neutrons) during this process?

In a nuclear reaction, if the total mass of the products is slightly less than the total mass of the reactants, what can be concluded about the reaction?

In a nuclear decay, a nucleus emits several particles. If the total momentum of the emitted particles is measured to be non-zero, what can be said about the momentum of the resulting nucleus?

A nuclear reaction results in a mass defect of $0.001$ atomic mass units (amu). How much energy is released in this reaction? (Note: $1 , amu = 1.66054 × 10^{-27} , kg$ and $c = 3 × 10^8 , m/s$)

What is the key difference between spontaneous and induced fission?

In a fission reaction, $235U$ absorbs a neutron and splits into $141Ba$, $92Kr$, and releases three neutrons. If the mass defect of this reaction is $0.215 , amu$, how much energy is released?

What is the primary source of energy production in the Sun?

A radioactive isotope has a half-life of 10 years. If you start with 1000 atoms of this isotope, how many atoms will remain after 30 years?