The velocity of light in vacuum is a universal constant and is represented by c and its value is 3 × 108 m/s.

The gravitational force of attraction between two point masses m1 and m2 is given by F = , where R is

the separation between the masses and G is a universal constant having value of 6.67 × 10–11 N-m2/kg2.

The third important point is energy of a electro magnetic wave is given by E = h ν or hc/ λ where h is also a universal constant named plank’s constant having value of 6.63 × 10–34 J-s, where ν frequency and λ is wavelength.

If we choose c, G and h as fundamental units then in this new system

(i) Find the dimensions of mass –