Question

If the unit of length , mass and energy is doubled then what happen?

Answer 1

If fundamental units of mass, length and time are each doubled, what happens to unit of energy

We know,

Energy

[E]=[ML2T−2]

[E′]=[2M4L2T−2/4]

=2[E]

Hence, Energy will be DOUBLED is the correct answer.  

Answer 2

In science, dimensional analysis is the analysis of the combinations between several physical quantities by identifying their base quantities such as length, mass, time, and electric charge.

We know,

Energy

[E]=[ML^2T^−2]

Now If fundamental units of mass, length and time are each doubled, we get

[E′]=[2M4L^2(T^-2)/4]

=2[E]

Hence, the energy is doubled.