5 3. Write a readable story on the basis of following outlines. A farm girl carrying a bucket of milk on head ... thinking about selling milk selling it to buy chickens chickens laying eggs selling eggs to buy many more chickens and cows selling cows to become rich thinking of marrying rich men after putting off marriage proposal tripped over a stone milk spilled not count chickens before hatched.

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.