a liquid flowing with a speed v through a horizontal pipe of cross sectional area A enters into another pipe of double the area of cross section. now the speed of liquid is-

Asked by architsrivastava02 | 6th Dec, 2010, 09:23: PM

Expert Answer:

In stesdy state total volume ( and hence mass ) should be conserved.
volume = A.vΔt.
where A : area of cross section
        vΔt : length travelled in time Δt.
initial volume= final volume
it implies
since A1/A2 =  1/2
therefore v2 = v1/2
                  = v/2

Answered by  | 8th Dec, 2010, 11:13: PM

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