Physics of Everyday Phenomena
9th Edition
ISBN: 9781259894008
Author: W. Thomas Griffith, Juliet Brosing Professor
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 9, Problem 21CQ
A large bird lands on a rowboat that is floating in a swimming pool. Will the water level in the pool increase, decrease, or remain the same when the bird lands on the boat? Explain.
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Physics of Everyday Phenomena
Ch. 9 - Is it possible for a 100-lb woman to exert a...Ch. 9 - If we measure force in pounds (lb) and distance in...Ch. 9 - The same force is applied to two cylinders that...Ch. 9 - A penny and a quarter are embedded in the concrete...Ch. 9 - Prob. 5CQCh. 9 - The fluid in a hydraulic system pushes against two...Ch. 9 - If the output piston in a hydraulic pump exerts a...Ch. 9 - When a mercury barometer is used to measure...Ch. 9 - Could we use water instead of mercury to make a...Ch. 9 - Prob. 10CQ
Ch. 9 - Could we use water instead of mercury to make a...Ch. 9 - If you climbed a mountain carrying a mercury...Ch. 9 - If you filled an airtight balloon at the top of a...Ch. 9 - When you go over a mountain pass in an automobile,...Ch. 9 - The plunger of a sealed hypodermic syringe...Ch. 9 - Helium is sealed inside a balloon impermeable to...Ch. 9 - Is it possible for a solid metal ball to float in...Ch. 9 - A rectangular metal block is suspended by a string...Ch. 9 - Is it possible for a boat made of concrete to...Ch. 9 - A block of wood is floating in a pool of water. a....Ch. 9 - A large bird lands on a rowboat that is floating...Ch. 9 - Is it possible that some objects might float in...Ch. 9 - A rowboat is floating in a swimming pool when the...Ch. 9 - If an object has a smaller density than water,...Ch. 9 - A steady stream of water flowing in a narrow pipe...Ch. 9 - Why does the stream of water flowing from a faucet...Ch. 9 - Does a stream of liquid with a high viscosity flow...Ch. 9 - If the speed of flow in a stream decreases, is the...Ch. 9 - Why is the flow of smoke from a cigarette often...Ch. 9 - If you blow between two limp pieces of paper held...Ch. 9 - A wind gust blows sideways across an...Ch. 9 - A hair dryer can be used to create a stream of...Ch. 9 - Prob. 33CQCh. 9 - Does the path of a curveball really curve? (See...Ch. 9 - A force of 60 N pushes down on the movable piston...Ch. 9 - A 150-lb woman puts all of her weight on one heel...Ch. 9 - A 270-lb man supports all of his weight on a...Ch. 9 - Prob. 4ECh. 9 - In a hydraulic system, a force of 540 N is exerted...Ch. 9 - The load-bearing piston in a certain hydraulic...Ch. 9 - A column of water in a vertical pipe has a...Ch. 9 - With the temperature held constant, the pressure...Ch. 9 - With the temperature held constant, the piston of...Ch. 9 - A 0.52-kg block of wood is floating in water. What...Ch. 9 - A block of wood of uniform density floats so that...Ch. 9 - A certain boat displaces a volume of 8.3 m3 of...Ch. 9 - A rock with a volume of 0.3 m3 is fully submerged...Ch. 9 - A stream moving with a speed of 3.5 m/s reaches a...Ch. 9 - Water emerges from a faucet at a speed of 1.5 m/s....Ch. 9 - An airplane wing with an average cross-sectional...Ch. 9 - Suppose the input piston of a hydraulic jack has a...Ch. 9 - Prob. 2SPCh. 9 - A copper block with a density of 8960 kg/m3 is...Ch. 9 - A flat-bottomed wooden box is 2.8 m long and 1.3 m...Ch. 9 - A pipe with a circular cross-section has a...
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- (a) What is the density of a woman who floats in freshwater with 4.00% of her volume above the surface? This could be measured by placing her in a tank with marks on the side to measure how much water she displaces when floating and when held under water (briefly). (b) What percent of her volume is above the surface when she floats in seawater?arrow_forwardA 10.0-kg block of metal measuring 12.0 cm by 10.0 cm by 10.0 cm is suspended from a scale and immersed in water as shown in Figure P15.24b. The 12.0-cm dimension is vertical, and the top of the block is 5.00 cm below the surface of the water. (a) What are the magnitudes of the forces acting on the top and on the bottom of the block due to the surrounding water? (b) What is the reading of the spring scale? (c) Show that the buoyant force equals the difference between the forces at the top and bottom of the block.arrow_forwardA 1.00-kg beaker containing 2.00 kg of oil (density = 916.0 kg/m3) rests on a scale. A 2.00-kg block of iron suspended from a spring scale is completely submerged in the oil as shown in Figure P15.63. Determine the equilibrium readings of both scales. Figure P15.63 Problems 63 and 64.arrow_forward
- A small piece of steel is tied to a block of wood. When the wood is placed in a tub of water with the steel on top, half of the block is submerged. Now the block is inverted so that the steel is under water. (i) Does the amount of the block submerged (a) increase, (b) decrease, or (c) remain the same? (ii) What happens to the water level in the tub when the block is inverted? (a) It rises. (b) It falls. (c) It remains the same.arrow_forward(a) How high will water rise in a glass capillary tube with a 0.500-mm radius? (b) How much gravitational potential energy does the water gain? (c) Discuss possible sources of this energy.arrow_forwardThe human brain and spinal cord are immersed in the cerebrospinal fluid. The fluid is normally continuous between the cranial and spinal cavities and exerts a pressure of 100 to 200 mm of H2O above the prevailing atmospheric pressure. In medical work, pressures are often measured in units of mm of H2O because body fluids, including the cerebrospinal fluid, typically have nearly the same density as water. The pressure of the cerebrospinal fluid can be measured by means of a spinal tap. A hollow tube is inserted into the spinal column, and the height lo which the fluid rises is observed, as shown in Figure P9.83. If the fluid ruses to a height of 160. mm, we write its gauge pressure as 160. mm H2O. (a) Express this pressure in pascals, in atmospheres, and in millimeters of mercury. (b) Sometimes it is necessary to determine whether an accident victim has suffered a crushed vertebra that is blocking the flow of cerebrospinal fluid in the spinal column. In other cases, a physician may suspect that a tumor or other growth is blocking the spinal column and inhibiting the flow of cerebrospinal fluid. Such conditions ran be investigated by means of the Queckensted test. In this procedure, the veins in the patients neck are compressed lo make the blood pressure rise in the brain. The increase in pressure in the blood vessels is transmitted to the cerebrospinal fluid. What should be the normal effect on the height of the fluid in the spinal tap? (c) Suppose compressing the veins had no effect on the level of the fluid. What might account for this phenomenon?arrow_forward
- Why is it difficult to swim under water in the Great Salt Lake?arrow_forwardA beaker of mass mb containing oil of mass mo and density o rests on a scale. A block of iron of mass mFe suspended from a spring scale is completely submerged in the oil as shown in Figure P15.63. Determine the equilibrium readings of both scales. Figure P15.63 Problems 63 and 64.arrow_forwardThe human brain and spinal cord are immersed in the cerebrospinal fluid. The fluid is normally continuous between the cranial and spinal cavities and exerts a pressure of 100 to 200 mm of H2O above the prevailing atmospheric pressure. In medical work, pressures are often measured in units of mm of H2O because body fluids, including the cerebrospinal fluid, typically have nearly the same density as water. The pressure of the cerebrospinal fluid can be measured by means of a spinal tap. A hollow tube is inserted into the spinal column, and the height lo which the fluid rises is observed, as shown in Figure P9.83. If the fluid ruses to a height of 160. mm, we write its gauge pressure as 160. mm H2O. (a) Express this pressure in pascals, in atmospheres, and in millimeters of mercury. (b) Sometimes it is necessary to determine whether an accident victim has suffered a crushed vertebra that is blocking the flow of cerebrospinal fluid in the spinal column. In other cases, a physician may suspect that a tumor or other growth is blocking the spinal column and inhibiting the flow of cerebrospinal fluid. Such conditions ran be investigated by means of the Queckensted test. In this procedure, the veins in the patients neck are compressed lo make the blood pressure rise in the brain. The increase in pressure in the blood vessels is transmitted to the cerebrospinal fluid. What should be the normal effect on the height of the fluid in the spinal tap? (c) Suppose compressing the veins had no effect on the level of the fluid. What might account for this phenomenon?arrow_forward
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