Figure below shows a liquid being pushed out of the tube by a piston having area of cross section $2 . 0{cm}^{2}$ . The area of cross section at the outlet is $10{mm}^{2}$ . If the piston is pushed at a speed of $4cm{s}^{- 1}$ , the speed of outgoing fluid is _____ $cm{s}^{- 1}$

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Figure below shows a liquid being pushed out of the tube by a piston having area of cross section 2 . 0 cm ^ 2 . The

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The given data is A _ 1 = 2 × 10 ^ - 4 m ^ 2 A _ 2 = 10 × 10 ^ - 6 m ^ 2 v _ 1 = 4cm s ^ - 1 Using equation of continuity which is a conservation of mass principle, A _ 1 v _ 1 = A _ 2 v _ 2 ⇒ v _ 2 = A _ 1 v _ 1 A _ 2 = 2 × 10 ^ - 4 × 4 10 × 10 ^ - 6 = 80cm s ^ - 1

Figure below shows a liquid being pushed out of the tube by a...

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