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1. The plunger and the needle of a hypodermic syringe have areas of 0.5 cm2 and 0.0003 cmz, respectively. To inject a vaccine, a nurse
1. The plunger and the needle of a hypodermic syringe have areas of 0.5 cm2 and 0.0003 cmz, respectively. To inject a vaccine, a nurse pushes the plunger with a fore of 5.5 N. What pressure is transmitted to the vaccine? 2. A sample of an unknown material weighs 300 N in air and 200 N when submerged in an alcohol solution with a density of 0.70 m0?5 kgfm3. What is the density of the material? 3. Water flows through a horizontal pipe with a cross sectional area of four-square meters at the speed of 5 mils with the pressure of 300,000 Pa at point A. At point B, the cross-sectional area is 2 square meters. (a) what is the speed of water at point B? (b) Calculate the pressure at point B
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