PROBLEM 3.19 Shaft AB is made of a steel with an allowable shearing stress of 90 MPa and shaft BC is made of an aluminum with an allowable shearing stress of 60 MPa. Knowing that the diameter of shaft BC is 50 mm and neglecting the effect of stress concentrations, determine (a) the largest torque T that can be applied at A if the allowable stress is not to be exceeded in shaft BC, (b) the corresponding required diameter of shaft AB.
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Laura and Philip each fire one shot at a target. Laura has probability 0.5 of hitting the target, and Philip has probability 0.3. The shots are independent.
a. Find the probability that the target is hit. b. Find the probability that the target is hit by exactly one shot. c. Given that the target was hit by exactly one shot, find the probability that Laura hit the target.
Technician Asays directional tires will have markings on the sidewall to indicate how the tire must be mounted to the vehicle. Technician B says tire tread patterns may be symmetric or asymmetric. Who is correct?
A. A only B. B only C. both A and B D. neither A nor B
_____ vehicles combine features of both rear- and front-wheel drive systems so power can be delivered to all wheels all the time or when the conditions or driver selects two- or four-wheel drive.
A. AWD or 4WD B. FWD or RWD C. Hybrid D. All-terrain
When preparing for pump shutdown and repair, obtain a ________ permit, and purge the pump and lines as required by company policy
A) line-repair B) purge C) flush D) line-opening