The volume fo mercury and water is 50 ml each. What is the ratio of their mass, if their densities are in the ratio 68:5?

A hollow sphere of simple pendulum is first filled with mercury and then with water . The time periods are in the ratio if their densities are in the ratio 13.6:1

A hollow sphere of simple pendulum is first filled with mercury and then with water. The time periods are in the ratio of their densities are in the ratio 13.6 :1

What is the ratio by mass of H and O in water ?

Two masses are in the ratio 1 : 5. What is the ratio of their inertia?

Two nuclei have mass numbers in the ratio 2:5. What is the ratio of their nuclear densities?