Which statement is true about present day Earth? It is in the Precambrian time span.

It is in the Cambrian time span.

It is in the Cenozoic Era.

It is in the Mesozoic Era.

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

The total amount of energy contained in an object

The force it would take to accelerate an 900-kg car at the rate of 6m/s2