alleryWhich aircraft class floats using gas lighter than air?
AAerostats such as balloons
BRotary-wing aircraft
CFixed-wing aircraft
DGyroplane aircraft
Answer & Solution
Correct answer: A. Aerostats such as balloons
1. An aerostat holds a gas of lower density than the surrounding air, which gives lift.
2. Fixed-wing and rotary-wing aircraft depend on air flowing over wings or blades.
3. Only the stated answer fits the facts given in the source.
_Source: Wikipedia, Transport: Air_
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