A uniform right circular cone of base radius 2a and height 8a rests in equilibrium with its base in contact with the Rough inclined plane the angle of inclination of the plane is then increase steadily. Assuming the plane is sufficiently rough to prevent slipping find the angle of inclination of the plane to the horizontal when the con is about to topple

The air in an automobile tire with a volume of 2.60 ft3 is at 70°f and 21 psig. determine the amount of air that must be added to raise the pressure to the recommended value of 30 psig. assume the atmospheric pressure to be 14.6 psia and the temperature and the volume to remain constant. the gas constant of air is ru = 53.34ft⋅lbflbm⋅r(1 psia144 lbf/ft2) = 0.3704 psia⋅ft3lbm⋅r the amount of air that must be added to raise the pressure is lbm