Physics
Refrigeration is a process which

Plasmolyses the bacteria
Kills bacteria
Slows down the bacterial growth
Inactivates the bacteria

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Physics
On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because:

cohesion of water is greater than its adhesion with glass.
mercury is a metal.
density of mercury is greater than that of water.
cohesion of mercury is greater than its adhesion with glass.

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Physics
Analog synthesis refers to a technology based on

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

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