In the photosynthetic reaction, which event normally occurs before the other three? A) oxygen release
B) water absorption
C) PGAL synthesis
D) glucose formation

for points guys

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

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.