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The apparent frequency (f′) heard by a stationary observer when a source is moving towards them is given by the Doppler effect formula: 
Who among the following goes immediately after O?
If S and the person who have Yellow interchange their visiting days then how many persons likes after the person who have red colour?
On which date Gupta celebrates his birthday?
Who among the following likes Tennis?
How many assignments were completed by student Y?
Seven persons R, S, T, U, V, W and X, live in a seven-storey building, but not necessarily in the same order. S lives two floors above X. X lives on an ...
Who among the following likes Labrador?
--------------- And --------------- don't live in same type of flat.
Who among the following sits to the extreme west on Floor - 2 and extreme east on Floor-4?
