Physics
Analog synthesis refers to a technology based on

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

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Physics
The earth is a

Bad absorber and bad radiator of heat
Good reflector of heat
Non-absorber of heat
Good absorber and good radiator of heat

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