1.Rank in ascending order the density of the following objects:

a) earth (radius6 km and weigh6 x 10^24 kg) b) a neutron (radius1 x 10^-15 m and weight1.7 x 10^-27 kg), c) The sun (radius700,000 km and weight 2 x 10^30 kg) d) A human being (estimate weight and volume).

2.A drop of mercury falls to the bottom of the Mariana Trench in the Pacific Ocean 11 km from depth. What is the volume of this drop of mercury at the bottom of the pit Vfond in relation to its volume at the surface of the ocean Vsurface.

Consider that salt water has a density of 1.025 g/cm^3, that liquid mercury has a density volume of 14 g/cm^3 and a modulus of elasticity K = 28.5 x 10^9 N/m^2.