Two black plates, each one meter square, are placed parallel to each other in such a way that the radiation shape factor for the system is $$0.4.$$ If the plates are maintained at $${800^ \circ }C$$ and $${400^ \circ }C$$ respectively, determine the net radiant heat transfer between the plates. Also calculate the net heat exchange if the plates were infinite in size. Stephen Boltzmann constant $$ = 5.67 \times {10^{ - 8}}\,\,W/{m^2}{K^4}$$

In an ideal inventory control system, the economic lot size for a part is $$1000.$$ If the annual demand for the part is doubled, the new economic lot size required will be:

Which of the following is a technique for forecasting?

Stress concentration in a machine component of a ductile material is not so harmful as it is in a brittle material because