Physics
Water boils at a lower temperature on the hills because

It is cold on the hills
There is less carbon dioxide on the hills
There is less oxygen
There is a decrease in air pressure on the hills

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Physics
To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor

Can be of any shape
Should be in the form of a vertical rod
Should be made of a good conductor like copper with sharp-pointed edges
Should be made of a good conductor but can be of any shape

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