The charge density in a nucleus varies with distance from the centre of the nucleus according to the curve in Fig.
Specify the mass of proton in kilogram and in the $'u'$ unit.
The force acting between proton and proton inside the nucleus is
Which of the following particle has similar mass to electron
Write and explain the Einstein theory of special relativity.
How much was the radius of the nucleus estimated from the experiment of $\alpha -$ scattering ?