2. A hypodermic syringe contains a medicine with density of 1,000 kg/m?. The barrel of the syringe has a cross-sectional area A= 2.40 x 10-5 m', and the needle has a cross-sectional area a = 1.00 x 10-8 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 acts on the plunger, making medicine squirt horizontally from the needle. (a) What is the applied pressure in the syringe when the force acts on the plunger? (b) Determine the speed of the medicine inside the barrel with area A when is acting on it. (c) Calculate the speed of the medicine as it leaves the needle's tip.

2. A hypodermic syringe contains a medicine with density of 1,000 kg/m?. The barrel of the syringe has a cross-sectional area A= 2.40 x 10-5 m', and the needle has a cross-sectional area a = 1.00 x 10-8 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 acts on the plunger, making medicine squirt horizontally from the needle. (a) What is the applied pressure in the syringe when the force acts on the plunger? (b) Determine the speed of the medicine inside the barrel with area A when is acting on it. (c) Calculate the speed of the medicine as it leaves the needle's tip.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Variation of pressure

From the equation of pressure, pressure is directly proportional to the applied force.

Question

2. A hypodermic syringe contains a medicine with density of 1,000 kg/m. The barrel of the syringe has a
cross-sectional area A= 2.40 x 10-5 m², and the needle has a cross-sectional area a = 1.00 x 10-8 m². In
the absence of a force on the plunger, the pressure everywhere is 1.00 atm. A force Fof magnitude 2.00
N acts on the plunger, making medicine squirt horizontally from the needle.
(a) What is the applied pressure in the syringe when the force acts on the plunger?
(b) Determine the speed of the medicine inside the barrel with area A when is acting on it.
(c) Calculate the speed of the medicine as it leaves the needle's tip.

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