11/10/2015 08:00 AM 70/100 Gradebook Print Calculator -d Periodic Table Question
ID: 1460424 • Letter: 1
Question
11/10/2015 08:00 AM 70/100 Gradebook Print Calculator -d Periodic Table Question 9 of 10 Presented by UNIVERSITY PHYSICS Philip R. Kesten David L. Tauck sapling leaming ater flows through a 0.5-cm-diameter pipe connected to a 1-cm-diameter pipe. Compared to the speed or the water in the 0.5-cm pipe, the speed in the 1-cm pipe is O the same as the speed in the 0.5-cm pipe. O one-half the speed in the 0.5-cm pipe. O one-quarter the speed in the 0.5-cm pipe. O double the speed in the 0.5-cm pipe. O quadruple the speed in the 0.5-cm pipe. Previous Previous O check Answer 0 Next Check Answer NextExit Exit HintExplanation / Answer
3) one-quarter the speed in the 0.5 cm pipe.
because volume flow rate is constant.
Apply, continuty equation
A2*V2 = A1*V1
pi*r2^2*v2 = pi*r1^2*v1
v2 = v1*(r1/r2)^2
= v1*(0.5/1)^2
= 0.25*v1
= v1/4 <<<<-----------Answer
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