A hot air balloon works based on Archimedes' principle. If the weight of an entire hot air balloon is 2,227 newtons, then the hot air in the balloon needs to
be at least that much lighter than the cool air outside the balloon for it to float. Let's say
the balloon is a sphere with a radius of nine meters, and the density of air (at standard
temperature and pressure) is 1.2754 kg/m3. What should the weight of the air in the
balloon be for it to fly upward?
9,922 newtons
More than 9,922 newtons
O 12,149 newtons
O Less than 9,922 newtons