20 g of s are added to 500 g of isoprene. what is the maximum fraction of crosslinks that can be obtained assuming only 19% of the crosslinking atoms are effective. b) what conditions have to be satisfied for polyisoprene to exhibit elastomeric behavior? will it be an elastomer at -10c?

answer; protein;

there are two significant figures.

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.