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Chapter 14: Q.13 (page 384)
What is the height of a water barometer at atmospheric
pressure?
The height is 10.34 m
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A syringe has an inner diameter of , a needle inner diameter of 0.25mm, and a plunger pad diameter (where you place your finger) of . A nurse uses the syringe to inject medicine into a patient whose blood pressure is .
A. What is the minimum force the nurse needs to apply to the syringe?
B. The nurse empties the syringe in . What is the flow speed of the medicine through the needle?
The average density of the body of a fish is . To keep from sinking, a fish increases its volume by inflating an internal air bladder, known as a swim bladder, with air. By what percent must the fish increase its volume to be neutrally buoyant in fresh water? The density of air at .
The container shown in FIGURE EX14.12 is filled with oil. It is open to the atmosphere on
the left.
a. What is the pressure at point A?
b. What is the pressure difference between points A and B? Between points A and C?
Rank in order, from largest to smallest, the densities of blocks a, b, and c in FIGURE Q14.6. Explain.
A 50-cm-thick layer of oil floats on a 120-cm-thick layer of water. What is the pressure at the bottom of the water layer?
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