A rigid balloon filled with helium, when half of the helium is removed, will have increased lifting power due to a reduction in weight while maintaining the same volume. The buoyant force, which is responsible for lifting, depends on the volume of air displaced rather than the gas inside the balloon. By removing helium, the balloon can lift an additional load equivalent to the weight of the helium that was taken out. The concept illustrates that a lighter balloon can enhance lifting capacity, although creating a lightweight, rigid balloon capable of withstanding atmospheric pressure while containing a vacuum is largely theoretical. This thought experiment emphasizes the principles of buoyancy and weight in lifting scenarios.
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