b. The lifetime of a computer microprocessor chip behaves according to the probability law for P[(t, ꝏ)]= 1/t for t>1. Let A be the event “lifetime is greater than 4,” and B the event “lifetime is greater than 8.” • Find the probability of and A U B and A∩B. • Find the probability of the event “lifetime is greater than 6 but less than or equal to 12.

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.

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)

Asteel wire of 2 mm diameter is fixed between two points located 2 m apart. the tensile force in the wire is 250n, if its density of steel is given by 7830 kg/m3 the fundamental frequency of vibration hz? ?