Physics
In very cold countries alcohol is used as a thermometric liquid because

Alcohol is a poor conductor of heat
Its freezing point is very low
It will not stick to the glass tube
Alcohol can be coloured for its level to be seen easily

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Physics
Hydro-electric power is a:

Neither renewable nor non renewable resource
A mixture of renewable and non-renewable natural resource
Renewable natural resource
non-renewable natural resource

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