Physics
Analog synthesis refers to a technology based on

Representing data in terms of measurable physical quantities.
Representing physical quantities as numbers.
Placing brief digital recordings of live sounds under the control of a synthesizer keyboard.
Interfacing synthesizer equipment.

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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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Physics
Water pipes in hilly areas often burst on a cold frosty night, because

Frost makes the pipes rusty, so they break
The material of which pipes are made contracts due to cold and so breaks
Water in the pipes freezes and on freezing water expands, so pipes break
None of these

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