BIO A hypodermic syringe contains a medicine with thedensity of water (Fig. P9.37). The barrel of the syringe hasa cross-sectional area of 2.50 × 10-5 m². In the absence of aforce on the plunger, the pressure everywhere is 1.00 atm. Aforce F of magnitude 2.00 N is exerted on the plunger, mak-ing medicine squirt from the needle. Determine the medi-cine's flow speed through the needle. Assume the pressure inthe needle remains equal to 1.00 atm and that the syringe ishorizontal.A1P2P1A2Figure P9.37

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Asked Dec 23, 2019
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BIO A hypodermic syringe contains a medicine with the
density of water (Fig. P9.37). The barrel of the syringe has
a cross-sectional area of 2.50 × 10-5 m². In the absence of a
force on the plunger, the pressure everywhere is 1.00 atm. A
force F of magnitude 2.00 N is exerted on the plunger, mak-
ing medicine squirt from the needle. Determine the medi-
cine's flow speed through the needle. Assume the pressure in
the needle remains equal to 1.00 atm and that the syringe is
horizontal.
A1
P2
P1
A2
Figure P9.37
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BIO A hypodermic syringe contains a medicine with the density of water (Fig. P9.37). The barrel of the syringe has a cross-sectional area of 2.50 × 10-5 m². In the absence of a force on the plunger, the pressure everywhere is 1.00 atm. A force F of magnitude 2.00 N is exerted on the plunger, mak- ing medicine squirt from the needle. Determine the medi- cine's flow speed through the needle. Assume the pressure in the needle remains equal to 1.00 atm and that the syringe is horizontal. A1 P2 P1 A2 Figure P9.37

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Expert Answer

Step 1

Using Bernoulli’s equation,

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2(R-P.) 2(4) P- P =

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Step 2

The cross sectional area of the needle is very small. Hence, v1 can be...

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2(2.00 N) (1000kg/m )(2.50×10-m² =12.6m/s

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