How does the surface of the earth appear to a fish or a person sitting inside clear water?

How much surface of earth is covered by water ?

Earth can be thought of as a sphere of radius 6400 km.Any object (or a person) is pewrforming circular motion around the axis of the earth due to the earth rotation (period 1 day). What is acceleration of object on the surface of the earth (at equator) towards its centre? What is it at latitude theta ? How does these acceleration compare with g = 9.8 m//s^(2) ?

A fish in tank sees the outside world as if it is at the vertex of a cone such that the circular base of the cone is at the surface of the water.If the depth of the fish is d and the critical angle for water-air interface is C,what is the radius of circle?

How does the heat energy from the sun reaches earth?

How does surface tension change with temperature?

Why do the oil films on the surface of water appear to be coloured?