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Biology, 28.09.2020 14:01 dejabrewer01
Blimps were once filled with hydrogen, but now helium is used
instead. Why is helium a better choice than hydrogen?
a Hydrogen is no longer available in pure form.
b Helium is cheaper than hydrogen.
C Hydrogen is flammable, while helium is not.
d Helium is lighter than hydrogen.
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Blimps were once filled with hydrogen, but now helium is used
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