By what factor must the mass number A change for the nuclear radius to double?

If the radius of a nucleus with mass number 125 is 1.5 fermi then radius of nucleus with mass number 64 is

In which of the following cases the planet will have same value of .g. as that earth (a)with mass double to that of earth and radius sqrt2 times that of earth (b)with mass fourtimes that of earth and radius sqrt2 times that of earth (c)with mass one fourth that of the earth and radius half that of earth (d)with mass twice that of earth and radius 1/3 that of earth

What is Nuclear reaction ?

A_((s)) + B_((g)) + "heat" hArr 2C_((s)) + 2D_((g)) . At equilibrium the pressure of 'B is doubled. By what factor the concentration of 'D' should change, to reattain the equilibrium

What is meant by inter-nuclear axis?