gravitational potential energy is given by formula
![U = mgh](https://tex.z-dn.net/?f=U%20%3D%20mgh)
here we need to compare the gravitational potential energy of stone 2 with respect to stone 1
so we will say
![\frac{U_2}{U_1} = \frac{m_2gh}{m_1gh}](https://tex.z-dn.net/?f=%5Cfrac%7BU_2%7D%7BU_1%7D%20%3D%20%5Cfrac%7Bm_2gh%7D%7Bm_1gh%7D)
![\frac{U_2}{U_1} =\frac{m_2}{m_1}](https://tex.z-dn.net/?f=%5Cfrac%7BU_2%7D%7BU_1%7D%20%3D%5Cfrac%7Bm_2%7D%7Bm_1%7D)
given that
![m_2 = 4 m_1](https://tex.z-dn.net/?f=m_2%20%3D%204%20m_1)
now we have
![\frac{U_2}{U_1} = 4](https://tex.z-dn.net/?f=%5Cfrac%7BU_2%7D%7BU_1%7D%20%3D%204)
The base unit for time is Second.
Newlands - gave idea of law of octaves, he arranged in order of relative atomic mass
Mendeleev - gave idea of periodic table, he arranged in order of relative atomic mass