The sample mean of 13 bowling balls measured from a manufacturing line is 10.12 lbf^2 with a sample variance of 0.28 ibf^2. determine the range (in n) that contains the true standard deviation of all the bowling balls assuming 90 % confidence

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

Wiy doeres rere okhn a pump whon working betwon the same pressure range?

Acircular aluminum shaft mounted in a journal is shown. the symmetric clearance gap between the shaft and journal is filled with sae 10w-30 oil at t 30°c. the shaft is caused to turn by the attached mass and cord. develop and solve a differential equation for the angular speed of the shaft as a function of time.