Fluids TestMultiple ChoiceIdentify the choice that best completes the statement or answers the question.1.Which of the following statements about floating objects is correct?a.The objects density is greater than the density of the fluid on which it floats.b.The objects density is equal to the density of the fluid on which it floats.c.The displaced volume of fluid is greater than the volume of the object.d.The buoyant force equals the objects weight.2.What is the pressure at a depth of 580 m in a lake?a.3.7 106 Pac.4.2 106 Pab.5.8 106 Pad.8.5 106 Pa3.A water tunnel has a circular cross section where the diameter diminishes from 3.6 m to 1.2 m. If the velocity of water flow is 3.0 m/s in the larger part of the tunnel, what is the velocity of flow in the smaller part of the tunnel?a.9.0 m/sc.27 m/sb.18 m/sd.54 m/s4.A liquid-filled tank has a hole on its vertical surface just above the bottom edge. If the surface of the liquid is 0.4 m above the hole, at what speed will the stream of liquid emerge from the hole?a.1.7 m/sc.2.8 m/sb.2.0 m/sd.7.8 m/s5.A cube of wood with a density of 0.780 g/cm3 is 10.0 cm on each side. When the cube is placed in water, what buoyant force acts on the wood?a.7.65 103 Nc.7.65 Nb.5.00 Nd.6.40 N6.The figure shows a portion of a conduit for water, one with rectangular cross sections. If the flow speed at the top is v, what is the flow speed at the bottom?a.2vc.8vb.4vd.16v7.A pump is used to send water throught a hose, the diameter of which is 10 times that of the nozzle through which the water exits. If the nozzle is 1 m higher than the pump, and the water flows through the hose at 4.0 m/s, what is the gauge pressure of the water at the pump?a.108 kPac.400 kPab.260 kPad.810 kPa8.Water flows into a house at a velocity of 15 m/s through a pipe that has a radius of 0.40 m. The water then flows through a smaller pipe at a velocity of 45 m/s. What is the radius of the smaller pipe?a.0.53 mc.0.17 mb.0.23 md.0.37 m9.In a pipe, the inlet diameter is 3 cm and has a flow speed of 6 m/s. At the outlet point, the diameter is 9 cm. Calculate the flow speed at the outlet.a.2/3 m/sc.4 m/sb.2 m/sd.18 m/s10.A plastic cube 0.5 m on each side and with a mass of 100 kg floats in water. What fraction of the cubes volume is above the surface of the water?a.1/5c.3/4b.1/4d.4/511.Water flows through a horizontal tapered pipe. At the wide end its speed is 4.0 m/s. The difference in pressure between the two ends is 4.5x103 Pa. The speed of the water at the narrow end is:a.3.4 m/sc.4.3 m/sb.4.0 m/sd.5.0 m/s12.Water is pumped through the hose shown below, from a lower level to an upper level. Compared to the water at point 1, the water at point 2:a.has greater speed and greater pressurec.has less speed and less pressureb.has greater speed and less pressured.has less speed and greater pressure13.To obtain the absolute pressure from the gauge pressure:a.subtract atmospheric pressurec.multiply the density, mass, and gravityb.add atmospheric pressured.convert to N/m214.1Pa is:a.1N/mc.1 kg/ms2b.1 kg/msd.1N/ms15.The vessels shown below all contain water to the same height. Rank them according to thepressure exerted by the water on the vessel bottoms, least to greatest.a.1, 2, 3, 4c.4, 3, 2, 1b.3, 4, 2, 1d.All pressures are the same.