Physics
One can distinguish a telescope from a microscope by observing

Length
Length and size of the lens
Size of the lens
Colour

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Physics
Pressure Cooker cooks faster because

Higher temperature is attained for cooking
It cooks the food at low pressure
Boiling point decreases with rise of pressure
The material of the cooker is a good conductor

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Physics
Analog synthesis refers to a technology based on

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

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