Why is thermoregulation more effectively achieved in larger animals than in smaller ones?

Why are powdered substances more effective adsorbents than their crystalline forms?

Why are medicines more effective in colloidal state ?

why is is the problem of predation in plants more severe than that in animal?

Why is ice at 273 K more effective in cooling than water at the same temperature ?

Consider two conducting spheres of radii of R_1 and R_2 with R_1 > R_2 . If the two are at the same potential the larger sphere has more charge than the smaller spheres. State whether the charge density of the smaller sphere is more or less than that of the larger one.

Why is one molar solution more concentrated than one molal solutions ?