The red blood cells from 100 different human blood samples were studied. All the red blood cells observed lacked nucleiFrom this study, the investigator conduded that the red blood cells of all vertebrate animals do not contain nuclei. Using one or more complete sentences, state whether or not this conclusion is valid and explain the reason for your answer.

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.