12. Which of the following is an example of a good scientific question? Why? a. How big is an ant?
b. Where do rabbits live?
C. Which make better pets, fish or dogs?
d. What will happen to the freezing point of water if salt is added?

the answer is b & c i believe : )

a is the correct 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.

it is reliable if two scientists recorded it