How are models affected by new evidence? A. Data are discarded if they don't fit the model.
B. Models are changed if they don't fit new data.
C. Models are replaced regularly when they get old.
D. Models are discarded when new evidence is obtained.

B. Models are changed if they don't fit new data

Explanation:

the answer is a and have a great day

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.