vector is described as having magnitude 5 and angle -20°. which is an equivaent statement of magnitude and angle of vector ? (note: all angles are measured counterclockwise from the x-axis.)

magnitude 5; angle 70°

magnitude 5; angle 20°

magnitude -5; angle 20°

magnitude 5; angle 160°

magnitude -5; angle 160°

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good

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

Distinguish between linear momentum and angular momentum