Sodium azide is stable at room temperature but decomposes quickly at temperatures above 300°C. It is moderately inexpensive to manufacture but is highly toxic. Read this article on the effects of undeployed airbags. Based on the article, does sodium azide seem like a good match for the criteria and constraints you listed in part A? In what ways is sodium azide a good choice for an airbag design, and in what ways is it not?

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.