Agear set uses of an 18-tooth pinion, has a diametral pitch of 8 teeth in and a pressure angle of ? -20 . the pinion runs at 750 rev/min and drives a gear at a speed of 500 rev/min. (a) find the number of teeth required on the gear. (b) what is the theoretical center-to-center distance of the shafts?

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1