A solid sphere and a hollow sphere having the same mass and external radius are immersed in the same liquid. Which one will feel heavier?

Explanation

Since the radii of both the spheres are the same, their external volumes are equal. So, both of them will displace an equal weight of the liquid. According to Archimedes. principle, apparent loss of weight of a body in a liquid = weight of liquid displaced by the body. So, loss of weight suffered by both the spheres will be the same and, hence, the apparent weight of them will be the same.