1. find the surface area of a sphere with a circumference of 86 cm. round to the nearest tenth. a. 2,354.2 cm2
b. 1,177.1 cm2
c. 187.3 cm2
d. 13.7 cm2

2. a balloon has a circumference of 16 cm. use the circumference to approximate the surface area of the balloon to the nearest square centimeter. a. 804 cm2
b. 326 cm2
c. 256 cm2
d. 81 cm2

Which two objects have the greatest gravitational force acting between them

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 record distance in the sport of throwing cowpats is 81.1 m. this record toss was set by steve urner of the united states in 1981. assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) determine the initial speed of the projectile. m/s