If i can live with a 3% probability of failure, select a ball bearing design (independent of shaft diameter that will carry a 120 ib load at 3000 rpm. how long can i expect the selected bearing to perform satisfactorily? how long can i expect it to last if i run it at the static load rating for the bearing?

The air in an automobile tire with a volume of 0.015 m3 is at 32°c and 140 kpa gage. determine the amount of air that must be added to raise the pressure to the recommended value of 206 kpa gage. assume the atmospheric pressure to be 128 kpa and the temperature and the volume to remain constant.[r-0.287 kj/kgk]