Calculate α, ω0, s1, and s2 for a source-free parallel RLC circuit if (i) R = 4 Ω, L = 2.22 H, and C = 12.5 mF; (ii) L = 1 nH, C = 1 pF, and R is 1% of the value required to make the circuit underdamped. (iii) Calculate the damping ratio for the circuits of parts (i) and (ii

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false