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inysia [295]
3 years ago
6

Hydrogen fuel cells are used on the space shuttle to provide the shuttle with all of its electrical energy. Explain why fuel cel

ls are used instead of batteries.
Physics
1 answer:
UkoKoshka [18]3 years ago
5 0

Answer:

Hydrogen used in fuel cells has the energy to weight ratio ten times greater than lithium-ion batteries. Consequently, it offers much greater range while being lighter and occupying smaller volumes. It can also be recharged in a few minutes, similarly to gasoline vehicles.

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What's the name of first planet closest to the Sun?
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Answer:

Mercury

Explanation:

It is the smallest planet in our solar system and closest to the Sun

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A book weighing 5 N rests on top of a table. 1) A downward force of magnitude 5 N is exerted on the book by the force of
andreev551 [17]

Answer:

1) A downward force of magnitude 5 N is exerted on the book by the force of of gravity

2) An upward force of magnitude 5 N is exerted on the book by the table

Explanation:

First of all, any object near the Earth's surface experiences the forces of gravity, which is also called weight of the object. This force always acts downward.

For the book in the problem, the magnitude of the weight is 5 N.

We also know that the book is at rest: this means that the net force acting on it is zero, and there must be another force balancing the weight, in order to give a zero net force. This other force is the reaction force exerted by the table on the book: the magnitude of this force must be equal to the force of gravity (so, 5 N) and its direction is opposite to the weight, therefore upward.

7 0
3 years ago
10. How much work is done by gravity if it pulls a 100 N object down 2 m?
NeTakaya

Answer:

200 J

Explanation:

W = f * d

W = 100N * 2m

W = 200 J

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3 years ago
If A=
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What piece of sports equipment is aerodynamic
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