One area of concern in athletics is the use of steroids. One anabolic steroid called tetrahydrogestrinone or THG has been in the news for several years due to the popularity of the drug among athletes. THG has a molecular mass of 312.5 grams per mole[g/mol]. A test is being developed to determine if an athlete has used THG. The detection limit is 2 nanograms per milliliter[ng/mL]. In a sample of 0.08 liters [L], how many moles [mol] of THG must be present to surpass the detection limit?

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.

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false