Suppose a conventional water bottle cap is made with a single-start thread of 0.125 in pitch. Further suppose that the lid must be rotated 2.75 times to completely close the bottle, requiring the typical use to re-clutch the lid approximately 4 times to screw the lid shut. If the lid is re-designed with exactly the same pitch, but three starts, rather than one, how many times must the lid be rotated to completely close the bottle

On a average work day more than work place firs are reorted

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)

Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg. k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m. k