For the circuit shown, given that β=100, , , choose such that the BJT is driven to the edge of saturation. (a) 7 kΩ
(b) 50 kΩ
(c) 3.5 kΩ
(d) 4 kΩ

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.