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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

Arun
24742 Points
```							radius of helium balloon = 30 cmdensity of air = 1.9 kg/m3To find-buoyant forceSolution-Buoyant force = p*v*gwhere p = density , v=volume , g=gravity= {p(air)-p(he)}*v*g={ 1.29-0.178}* 4/3πr^3*9.8= 1.23NBouyant Force = 1.23N
```
8 months ago
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• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions