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?

An electric kettle is made out of stainless steel, weighs two pounds (when empty) and is equipped with a heating element that consumes 2 kw of electricity. assuming that the water and the kettle are at the same uniform temperature at any moment of time, calculate the shortest possible time to bring 2 quarts of water from room temperature to the onset of boiling