A baloon 1.2 g when empty has volume 800 cm ^3 and is filled with helium. density of air is 1.29 kg/m^3 while that of helium is .179 kg/m.
a. describe free body diagram for balloon and contents
b. calculate mass of helium
c. calculate magniyudes of each force in part a
d. calculate net force on the balloon (magnitude and direction)
e. calculate acceleration of balloon