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Grade: 12

                        

What is the buoyant force on a helium balloon with a radius of 30 cm in air, if the density of air is 1.9kg per cubic metre? Show working out please.

8 months ago

Answers : (1)

Arun
24742 Points
							
radius of helium balloon = 30 cm
density of air = 1.9 kg/m3
To find-
buoyant force
Solution-
Buoyant force = p*v*g
where p = density , v=volume , g=gravity
= {p(air)-p(he)}*v*g
={ 1.29-0.178}* 4/3πr^3*9.8
= 1.23N
Bouyant Force = 1.23N
 
8 months ago
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