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Review Exercise - 5.4 (Answers)

1. The two men who made lighter­than-air flight possible were Joseph and Tiberius Cavallo.

2. Montgolfier gas is another name for helium.

3. The first two men to fly a lighter-than­air craft were Marquis d'Arlandes and Pilatre de Rozier.

4. J.A.C. Charles and another man made the first flight in a hydrogen balloon.

5. Henry Cavendish isolated hydrogen.

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