The Hindenburg, the German zeppelin that caught fire in 1937 while docking in Lakehurst, New Jersey, was a rigid duralumin-frame balloon filled with 2.000• l05 m3 of hydrogen. The Hindenburg's useful lift (beyond the weight of the zeppelin structure itself) is reported to have been 1.099-106 N (or 247,000 lb). Use ρair = 1.205 kg/m3, ρH = 0.08988 kg/m3 and pHe = 0.1786 kg/m3.
a) Calculate the weight of the zeppelin structure (without the hydrogen gas).
b) Compare the useful lift of the (highly flammable) hydrogen-filled Hindenburg with the useful lift the Hindenburg would have had had it been filled with (nonflammable) helium, as originally planned.
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