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Astronomy
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Rocket Performance and Mass Fraction
Grade Level
Astronomy
AST.272 Rocket Performance and Mass Fraction
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A planetary-defense interceptor needs to leave Earth with as much useful speed as possible. Which design idea best supports that goal?
A
Keep every empty stage attached to make the spacecraft longer.
B
Use efficient upper stages and discard empty stages when they are no longer useful.
C
Choose the heaviest possible payload even if it is not needed.
D
Lower exhaust speed so the propellant leaves more slowly.
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