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Quiz1Solution - medicine’s flow speed through the needle...

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QUIZ 1 The hypodermic syringe contains a medicine with the same density of water. The barrel of the syringe has a cross-sectional area of 4.65349 × 10 5 m 2 . The cross-sectional area of the needle is 1.65082 × 10 8 m 2 . In the absence of a force on the plunger, the pressure everywhere is 1.0 atm. A force of magnitude 1.42268 N is exerted on the plunger, making medicine squirt from the needle. Find the
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Unformatted text preview: medicine’s flow speed through the needle. Assume that the pressure in the needle remains at atmospheric pressure, that the syringe is horizontal, that the speed v 1 of the fluid in the syringe is much smaller than the speed v 2 of the fluid in the needle and that the speed of the emerging fluid is the same as the speed of the fluid in the needle....
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