Which of the following would increase the rate at which most solids dissolve? A.
decrease agitation

B.
decrease surface area

C.
increase the amount of solvent

D.
increasing the temperature

petroleum? coal maybe?

catya that's not even a b or c

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.