ISBN: 978-1285737027

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Oil having a density of 930 kg/m^{3} floats on water. A rectangular block of wood 4.00 cm high and with a density of 960 kg/m^{3} floats partly in the oil and partly in the water. The oil completely covers the block. How far below the interface between the two liquids is the bottom of the block?

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The approximate diameter of the aorta is 0.50 cm; that of a capillary is 10 μm. The approximate average blood flow speed is 1.0 m/s in the aorta and 1.0 cm/s in the capillaries. If all the blood in the aorta eventually flows through the capillaries, estimate the number of capillaries in the circulatory system.

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Water is forced out of a fire extinguisher by air pressure, as shown in the figure below. What gauge air pressure in the tank (above atmospheric pressure) is required for the water to have a jet speed of 30.0 m/s when the water level in the tank is 0.500 m below the nozzle?

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A certain fluid has a density of 1 080 kg/m^{3} and is observed to rise to a height of 2.1 cm in a 1.0-mm-diameter tube. The contact angle between the wall and the fluid is zero. Calculate the surface tension of the fluid.

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The inside diameters of the larger portions of the horizontal pipe depicted in the figure are 2.50 cm. Water flows to the right at a rate of 1.80 x 10^{-4} m^{3}/s. Determine the inside diameter of the constriction.

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