Indirect costs incurred in a manufacturing environment that cannot be traced directly to a product are treated as a. product costs and expensed when incurred b. period costs and expensed when the goods are sold c. product costs and expensed when the goods are sold d. period costs and expensed when incurred

C. product costs and expensed when the goods are sold

Explanation:

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.