Physics
Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjacent nodes is :

1.5
1
2
1.2

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Physics
Analog synthesis refers to a technology based on

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

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Physics
In the process of magnetisation of a bar

The entire bulk of the bar gets magnetised
Only the ends of the bar get magnetised
Only some parts of the outer layers of the bar get magnetised
Only the surface of the bar gets magnetised

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