Hydrogen fuel requires vast amounts of electricity.
a. true
b. false

The statement ‘Hydrogen fuel requires vast amounts of electricity’ is true. The answer is letter A. Because hydrogen does not occur naturally, it requires a great amount of energy to convert substances that contain hydrogen. 

the answer is kevlar

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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