A hypodermic syringe whose cylinder has a crosssectional area of 60 mm 2 is used to inject
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A hypodermic syringe whose cylinder has a crosssectional area of 60 mm2 is used to inject a liquid medicine into a patient’s vein in which the blood pressure is 2 kPa.
(a) What is the minimum force needed on the plunger of the syringe?
(b) Why is the crosssectional area of the needle irrelevant?
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