distance of each pan from the center or fulcrum is given as

now if dishonest shopkeeper shifted it by 0.633 cm from center
so distance on each side is given as


now the weight is balance as


now we will have

now we can find the percentage change as


E = hf = hc/λ
= (6.6 x 10^-34) × (3 × 10^8) ÷ (3.1 × 10^-7)
=6.138 × 10^-32 J
I believe if it were heavier with more mass, then the sun would pull it in and there would be no mercury. It might also be hotter.