A balloon is a sphere with a radius of 5.0 m.the force of the air against the wall of loan is 45 N. what is the air pressure inside the balloon ? (Surface area = 12.56 x radius 2, 1 Pa = N/m^2)
Radius of balloon= 5.0m
surface area = 12.56 x (5.0m)^2 = 314 m^2
Air pressure inside balloon=force/surface area=45 N / 314 m^2 = 0.14 N/m^2
1 Pa = 1 N/m2
Answer is 1.4 X 10^-1 Pa
