Physics
In hydro power station, the motion produced in turbines is due to

Production of steam
Flow of water
Burning of coal
Burning of diesel

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Physics
Siphon will fail to work if:

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

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