Which law tells us about the nature of force?

Which lines tell us about the insufferable pain that the poet feels at the thought of the plight of the rural poor?

When a crystal of potassium peramagnate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of pottassium permanganate and water?

In a Mendelian monohybrid cross, the F_(2) -generation shows identcal genotypic and phenotypic ratios. What does it tell us about the nature of alleles involved? Justify your answer.

Which is not the nature of nuclear force

What does a line spectrum tell us about the structure of an atom?