3. (8 pts) (Like 7.19) A spring of negligible mass has a constant k = 799 N/m. a) (2 pts) How far should you compress the spring to store 6.80 J of energy in it? b) (6 pts) You place your spring vertically and drop a 10.0 kg dictionary on it from a height of 0.250 m above the top of the spring. What is the maximum distance the spring will be

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