Water is shot nearly vertically upward in a decorative fountain and the stream is observed to broaden as it rises. Conversely, a stream of water falling straight down from a faucet narrows. What causes the effect in terms of moving fluids? Does surface tension enhance or reduce the effect in each case?

A square metal sheet 2.8 cm on a side and of negligible thickness is attached to a balance and inserted into a container of fluid. The contact angle is found to be zero, as shown in Figure a, and the balance to which the metal sheet is attached reads 0.40 N. A thin veneer of oil is then spread over the sheet, and the contact angle becomes 180", as shown in Figure b. The balance now reads 0.39 N. What is the surface tension of the fluid? N/m Need Help? Read

Water is flowing through a pipe with a constriction. The area of the narrow section is one-half the area of the wide section. If the velocity of the incompressible fluid is 3.2 m/s in the narrow section, then what is the velocity of the fluid in the wide section?   Multiple Choice   0.9 m/s   1.0 m/s   1.6 m/s   1.8 m/s   1.9 m/s

A container of cross-sectional area 107 cm2 contains liquid of density 1.75 g/cm3 to a height of 6.80 cm above a small hole of area 1.00 cm2 in the side. (a) Find the speed of the fluid as it leaves the hole.(b) Find the flow rate through the hole.

While sitting on a boat floating on a small pond, you drop an anchor into the water. The anchor immediately sinks to the bottom. Does the presence of the anchor in the water cause the pond to get shallower, deeper or stay the same compared to when the anchor was on the boat? Explain your answer.

A U-tube open at both ends is partially filled with water (Figure a). Oil having a density of 790 kg/m³ is then poured into the right arm and forms a column L = 5.18 cm high (Figure b). Shield Po FU h Water Oil a (a) Determine the difference h in the heights of the two liquid surfaces. cm (b) The right arm is then shielded from any air motion while air is blown across the top of the left arm until the surfaces of the two liquids are at the same height (Figure c). Determine the speed of the air being blown across the left arm. Take the density of air as 1.20 kg/m³. m/s

You place an open bottle filled with olive oil (density 880 kg/m^3) in a container filled with water so that the surfaces of both liquids are at the same level. The bottle has a hole in it 18cm below the surface that is initially closed with adhesive tape, as shown in (Figure 1).       Determine the vertical distance Δh between the oil surface and water surface after the tape is removed and the equilibrium is reached. Assume that the volume of water is much greater than the volume of olive oil, so that the decrease in the water level is negligible.

help A concrete block with a density of 6550 will sink in water, but a rope suspends it underwater underwater (that is, its completely underwater, not touching the bottom of the lake, and isn't moving. It measures 63 cm x 20 cm x 15 cm, and has a density of 6550 kg/m3. The density of water is 1000 kg/m3 Find the tension in the rope. Hint: Buoyancy problem - similar to the last problem, but add a rope pulling up.