A constriction in a pipe reduces its diameter from 4.0cm to 2 .0cm. Where the pipe is narrow the water speed is 8.0m/s. Where it is wide the water speed is:
Correct answer: D. 2.0m/s
- A. 16m/s
- B. 32m/s
- C. 4.0m/s
- D. 2.0m/s
Explanation
According to equation if continuity A2v1= A2v2∵Where d is greater area will also be greater and velocity will be low and vice versaA1=π(d1/2)2 , v1=? , d1=4.0cm A2=π(d2/2)2 , v2=8.0m/s. d2=2.0cmπ(d1/2)2 v1 = π(d2/2)2 v2π(4/2)2 v1== π(2/2)2 84 π v1 =8 πv1 = 2.0m/s
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