Answer / tinku

The principle of superposition states that the net
displacement at a given place and time caused by two or
more waves traversing the same space is the vector sum of
the displacements which would have been produced by the
individual waves separately.

what is doppler effect?

1 Answers   Matrix,

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Einstein said that if something could travel at light speed its mass would duplicate. How could it be?

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how the aspirator pump works?

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1 Answers   Google,

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what is the use of photometre?

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