Automobile : Petrol :: ? *
Answers
Answer:
Automobile : Petrol :: Spacecrafts : Cryogenic fuel
Answer:
The correct answer is Man: Food
Explanation:
Automobile: Petrol:: Man: Food
The automobile needs petrol to function and it is the energy which generates power for automobiles, Same way Food is an important need for man which makes them function and gives energy that generates power to them.
- This question can have multiple answers which relate to this term. The concept is ted as an Analogy.
- Analogy can be defined as a comparison of entities with comparable characteristics, often used to assist convey a principle or idea.
More examples to it.
- Television: Electricity
Similarly, television needs an electricity to process or function.
- Locomotive:coal
Just like petrol is used to functions automobiles, similarly coal is used to function Locomotive.
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Answer:
Automobile : Petrol :: Spacecrafts : Cryogenic fuel
Explanation:
Fuels known as cryogenic fuels must be stored at extremely low temperatures in order to stay liquid. Due to the extremely low temperatures frequently experienced in space and the lack of an environment that supports combustion, these fuels are employed in equipment that functions in space (such as rockets and satellites) (on Earth, oxygen is abundant in the atmosphere, whereas human-explorable space is a vacuum where oxygen is virtually non-existent). Most frequently, cryogenic fuels are liquefied gases, such liquid hydrogen.
Regenerative cooling is the technique used by some rocket engines to cool their cryogenic fuel before it is injected into the combustion chamber and ignited. Eugen Sänger first proposed this configuration in the 1940s. This design innovation, which is still utilised in liquid fueled engines today, was employed in all of the engines in the Saturn V rocket that launched the first manned missions to the Moon.
Liquid oxygen is frequently referred to as cryogenic fuel when it should rather be labelled an oxidizer.
[Reference needed] Any substance that may be produced to react with other substances to release energy as thermal energy or to be used for work is referred to as a fuel. Despite the fact that oxygen fits this description and doesn't need to be transported (for the majority of applications), it is nevertheless referred to as an oxidizer.
A cryogenic fuel system was added to the popular Tu-154 design by Russian aircraft manufacturer Tupolev.
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