A spherical balloon has a radius of 7.15 m and is filled with helium. How large cargo can it lift, assuming that the skin and structure of the balloon have a mass of 900 kg? Neglect the buoyant force on the cargo volume itself. Express your answer using two significant figures.
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Answerthe energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.explanationwe define electric potential as the ratio electric potential energy to the charge,    then the following gives us the potential difference,      the formula  may be on your formula sheet.the change in electric potential energy would be the energy that would needed to move it from point a to point b. solving for that, we get    using q = 8.00  × 10⁻¹⁹ c and  δv = 2.00 v, we get    the energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.