For the circuit in Fig. 6.70, calculate the value of R that will make the energy stored in the capacitor the same as that stored in the inductor under dc conditions.
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Carbon at 1273 K is contained in a 7-cm-inner-diameter cylinder made of iron whose thickness is 1.2 mm. The concentration of carbon in the iron at the inner surface is 0.5 kg/m3 and the concentration of carbon in the iron at the outer surface is negligible. The diffusion coefficient of carbon through iron is 3 × 10?11 m2/s. The mass flow rate of carbon by diffusion through the cylinder shell per unit length of the cylinder is
(a) 2.8?×?10?9 kg/s (b) 5.4?×?10?9 kg/s (c) 8.8?×?10?9 kg/s (d) 1.6?×?10?8 kg/s (e) 5.2?×?10?8 kg/s
____ is a process of shaping malleable metals by hammering or pressing between dies that duplicate the desired shape.
A. Adhesion B. Fusion C. Ductility D. Forging E. none of the above