Given are two balls of the same volume made of lead and tin. Which one is easier?

Density is a physical quantity equal to body mass per unit volume. Based on the definition, the formula follows: p = m / v, where p is the density of the substance, m is the mass, v is the volume. By the condition of the problem, the volumes of the balls are the same. Since the mass is directly proportional to the density, it follows that a ball of lead (density of lead = 11340 kg / m ^ 3) has a greater mass than a ball of tin (density of tin = 7300 kg / m ^ 3).