Mass spectral measurements were made on 10 replicate low concentration Pb-EDTA samples: 190.5 190.5 , 146.2 146.2 , 160.9 160.9 , 175.9 175.9 , 144.9 144.9 , 214.3 214.3 , 165.9 165.9 , 170.5 170.5 , 159.9 159.9 , and 177.5 177.5 counts. Ten measurements of a blank had a mean measurement of 44.3 44.3 counts. A sample containing 3.00 3.00 μM Pb-EDTA gave a measurement of 1777 1777 counts. Estimate the signal and detection limit for Pb-EDTA.

Fluids at rest possess no flow energy. a)- true b)- false

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

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.