1.Consider an air bubble rising from the bottom of a lake. Neglecting surface tension, determine approximately what the ratio of the density of the air in the bubble will be at a depth of 34ft to its density at a depth of 8 ft
2.The width of a lake is 16 km (it is a flat plane tangent to the radius of the sphere). How far does a horizontal plane depart from a level surface if the earth is a sphere with r=6371km?