Physics
In which of the following processes is energy released ?

Photosynthesis
Respiration
Absorption
Ingestion

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Physics
Hydro-electric power is a:

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

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Physics
Siphon will fail to work if:

Both its limbs are of unequal length.
The temperature of the liquids in the two vessels are the same.
The level of the liquid in the two vessels are at the same height.
The densities of the liquid in the two vessels are equal.

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