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| Topic: |
Science
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| Number of pages / Number of words: |
6 / 1621 |
Essay's paper body
The main engines in the Space Shuttle actually use two pumping stages and burn fuel to drive the second stage pumps.
All kinds of fuel combinations get used in liquid propellant rocket engines. For example:
? Liquid hydrogen and liquid oxygen - used in the Space Shuttle main engines
? Gasoline and liquid oxygen - used in Goddard's early rockets
? Kerosene and liquid oxygen - used on the first stage of the large Saturn V boosters in the Apollo program
? Alcohol and liquid oxygen - used in the German V2 rockets
? Nitrogen tetroxide/monomethyl hydrazine - used in the Cassini engines
Synthesis
Liquid solid
Spacecraft propulsion is used to change the velocity of spacecraft, Delta V...
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Each method has drawbacks and advantages, and spacecraft propulsion is an active area of research. Most spacecraft today are propelled by heating the reaction mass and allowing it to flow out the back of the vehicle. This sort of engine is called a rocket engine. All current spacecraft use chemical rocket for launch, though some have used air-breathing engines on their first stage...
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General points of the essay
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Your blood pumps in my veins, Granny.
Describe the main developmental tasks and milestones associated with each stage in human development over the lifespan. Then choose one phase only of human development and discuss the developmental needs of people in this stage. Discuss various sp...
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