How does Ocean play an important role in supplying water to us

The water we consume ultimately comes from the sea: because of sunlight, water heats up and evaporates into theatmosphere, where lower temperatures transform steam into droplets, which create clouds. ... More than 97% of the water on earth is in the oceans –the rest is found in glaciers, on lands and in the ground.

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.