Calculating Diameter of Balloon to Lift 20 Metric Tons

AI Thread Summary
To calculate the diameter of a spherical balloon needed to lift 20 metric tons using helium at a pressure of 101.325 kPa and a temperature of 21.1°C, understanding buoyant force is essential. The buoyant force is determined by the volume of displaced air, which can be calculated using the ideal gas law and the properties of helium. The discussion emphasizes the need for more detailed calculations and understanding of buoyant forces to arrive at a solution. Participants encourage further elaboration on the principles behind buoyancy and how to calculate the upward force acting on submerged objects. Ultimately, a thorough analysis of these factors will lead to the correct diameter for the balloon.
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Homework Statement



balloons are required to lift 20 metric tons. the pressure of helium is 101.325kpa. temp=21.1degcelsius.

what should be the diameter of the balloon if it was spherical in shape in order to lift the weight?


Homework Equations



bouyant force??


The Attempt at a Solution



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tnx.
 
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You need to show more work in order for us to help you. Tell us more about bouyant forces. What causes them? If you have an object that normally floats in water, and you hold it under water, how do you calculate the upward force that you feel from the object?
 

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