A car is moving north at 5.2 m/s2. Which type of motion do the SI units in this value express?
O A. Speed
B. Displacement
C. Acceleration
D. Velocity

It is really hard for me right know

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

If the area of a square has increased by a factor of 16, by how much has each side increased?