Physics
In which of the following industries is mica as a raw material?

Glass and Pottery
Cement
Electrical
Iron and Steel

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Physics
Siphon will fail to work if:

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

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