Problem 1RCQ: Give two examples of a fluid. Problem 2RCQ: What happens to the volume of a loaf of bread that is squeezed? What happens to the mass of the... Problem 3RCQ: Distinguish between mass density and weight density. Problem 4RCQ: Distinguish between force and pressure. Compare their units of measurement. Problem 5RCQ: How does the pressure exerted by a liquid change with depth of the liquid? How does the pressure... Problem 6RCQ: Ignoring the pressure of the atmosphere, if you swim twice as deep beneath the water surface, how... Problem 7RCQ: How does water pressure 1 m below the surface of a small pond compare to water pressure 1 m below... Problem 8RCQ: If you punch a hole in the side of a container filled with water, in what direction does the water... Problem 9RCQ: Why does buoyant force act upward on an object submerged in water? Problem 10RCQ: How does the volume of a completely submerged object compare with the volume of water displaced? Problem 11RCQ: State Archimedes principle. Problem 12RCQ: What is the difference between being immersed and being submerged? Problem 13RCQ: How does the buoyant force on a fully submerged object compare with the weight of water displaced? Problem 14RCQ: What is the mass in kilograms of 1 L of water? What is its weight in newtons? Problem 15RCQ: If a 1-L container is immersed halfway in water, what is the volume of water displaced? What is the... Problem 16RCQ: Does the buoyant force on a floating object depend on the weight of the object or on the weight of... Problem 17RCQ: What weight of water is displaced by a 100-ton floating ship? What is the buoyant force that acts on... Problem 18RCQ: By how much does the density of air increase when it is compressed to half its volume? Problem 19RCQ: What happens to the air pressure inside a balloon when the balloon is squeezed to half its volume at... Problem 20RCQ: What is the approximate mass in kilograms of a column of air that has a cross-sectional area of 1... Problem 21RCQ: How does the downward pressure of the 76-cm column of mercury in a barometer compare with the air... Problem 22RCQ: How does the weight of mercury in a barometer tube compare with the weight of an equal cross section... Problem 23RCQ: Why would a water barometer have to be 13.6 times as tall as a mercury barometer? Problem 24RCQ: When you drink liquid through a straw, is it more accurate to say that the liquid is pushed up the... Problem 25RCQ: What happens to the pressure in all parts of a confined fluid when the pressure in one part is... Problem 26RCQ: Docs Pascals principle provide a way to get more energy from a machine than is put into it? Defend... Problem 27RCQ: A balloon that weighs 1 N is suspended in air, drifting neither up nor down. How much buoyant force... Problem 28RCQ Problem 29RCQ: Does Bernoullis principle refer to internal pressure changes in a fluid, to pressures that a fluid... Problem 30RCQ: What do peaked roofs, convertible tops, and airplane wings have in common when air moves faster... Problem 46PAC: A 1-m-tall barrel is filled with water (with a weight density of 9800 N/m3). Show that the water... Problem 47PAC: Show that the water pressure at the bottom of the 50-m-high water tower in Figure 5.3 is 490,000... Problem 48PAC: The depth of water behind the Hoover Dam is 220 m. Show that the water pressure at the base of this... Problem 49PAC: The top floor of a building is 20 m above the basement. Show that the water pressure in the basement... Problem 50TAS: Suppose that you balance a 2-kg ball on the tip of your finger, which has an area of 1 cm2. Show... Problem 51TAS: A 12-kg piece of metal displaces 2 L of water when submerged. Show that its density is 6000 kg/m3.... Problem 52TAS Problem 53TAS: A rectangular barge, 5 m long and 2 m wide, floats in fresh water. Suppose that a 400-kg crate of... Problem 54TAS: Suppose that the barge in the preceding problem can be pushed only 15 cm deeper into the water... Problem 55TAS: A merchant in Kathmandu sells you a 1-kg solid gold statue for a very reasonable price. When you... Problem 56TAS: A vacationer floats lazily in the ocean with 90% of her body below the surface. The density of the... Problem 57TAS: Your friend of mass 100 kg can just barely float in fresh water. Calculate her approximate volume. Problem 58TAS: In the hydraulic pistons, shown, the smaller piston has a diameter of 2 cm. The larger piston has a... Problem 59TAS: On a perfect fall day, you are hovering at rest at low altitude in a hot-air balloon. The total... Problem 60TAS: What change in pressure occurs in a party balloon that is squeezed to one-third its volume with no... Problem 61TAS: A mountain climber of mass 80 kg ponders the idea of attaching a helium-filled balloon to himself to... Problem 62TAS Problem 63TAS: The wings of a certain airplane have a total bottom Surface area of 100 m2. At a particular speed,... Problem 64TAR: Rank the following from most to least: (a) The pressure at the bottom of a 20-cm-tall container or... Problem 65TAR: Rank, from most to least, the percentage of volume above the water line for: (a) A basketball... Problem 66TAR: Think about what happens to the volume of an air-filled balloon on top of water, and what happens to... Problem 67TAR: Rank, from greatest to least, the volumes of air in the glass when it is held: (a) Near the surface,... Problem 68TAR: Rank, from greatest to least, the buoyant forces supplied by the atmosphere for: (a) An elephant.... Problem 69TAR: Rank, from greatest to least, the amounts of lift on the following airplane wings. (a) Area 1000 m2... Problem 70E: When you squeeze a party balloon between your hands, what happens to the mass of the balloon? To its... Problem 71E: A can of diet soft drink floats in water, whereas a can of regular soft drink sinks. Discuss this... Problem 72E: The density of a rock doesn't change when it is submerged in water. Does your density change when... Problem 73E: You know that a sharp knife cuts better than a dull knife. Do you know why this is so? Defend your... Problem 74E: Which is more likely to hurtbeing stepped on by a 200-lb man wearing loafers or being stepped on by... Problem 75E: Stand on a bathroom scale and read your weight. When you lift one foot up so that you're standing on... Problem 76E: Why are people who are confined to bed less likely to develop bedsores on their bodies it they use a... Problem 77E Problem 78E: What common liquid covers more than two-thirds of our planet, makes up 60% of our bodies, and... Problem 79E: How much force is needed to push a nearly weightless but rigid 1-L carton beneath a surface of... Problem 80E: Why is it inaccurate to say that heavy objects sink and that light objects float? Give exaggerated... Problem 81E: Why does an inflated beach ball pushed beneath the surface of water swiftly shoot above the water... Problem 82E: A half-filled bucket of water is on a spring scale. Does the reading of the scale increase or remain... Problem 83E: When a wooden block is placed in a beaker that is brim full of water, what happens to the scale... Problem 84E: Why will a block of iron float in mercury but sink in water? Problem 85E: Why does a volleyball that is held beneath the surface of water have more buoyant force than a... Problem 86E: The mountains of the Himalayas are slightly less dense than the mantle material upon which they... Problem 87E: Give a reason why canal enthusiasts in Scotland appreciate the physics illustrated in Figure 5.16... Problem 88E: The Falkirk Wheel in Scotland (Figure 5.17) rotates with the same low energy no matter what the... Problem 89E: One gondola in the Falkirk Wheel carries a 50-ton boat, while the opposite gondola carries a 100-ton... Problem 90E: Both a 50-ton boat and a 100-ton boat float side by side in the gondola of the Falkirk Wheel, while... Problem 91E: A ship sailing from the ocean into a fresh-water harbor sinks slightly deeper into the water. Does... Problem 92E: In a sporting goods store, you see what appear to be two identical life preservers of the same size.... Problem 93E: Why is the pressure in an automobile's tires slightly greater after the car has been driven several... Problem 94E: How does the density of air in a deep mine compare with the air density at Earth's surface? Problem 95E Problem 96E: It is said that a gas fills all the space available to it. Why, then, doesn't the atmosphere go off... Problem 97E: Why is there no atmosphere on the Moon? Problem 98E: We can understand how pressure in water depends on depth by considering a stack of bricks. The... Problem 99E: If you could somehow replace the mercury in a mercury barometer with a denser liquid, would the... Problem 100E: Would it be slightly more difficult to draw soda through a straw at sea level or on top of a very... Problem 101E: Richards pump can operate at a certain maximum well depth in Pocatello, Idaho. Would this maximum... Problem 102E: Why is it so difficult to breathe when snorkeling at a depth of 1 m, and practically impossible at a... Problem 103E: Say youve had a run of bad luck, and you slip quietly into a small, calm pool as hungry crocodiles... Problem 104E: In the hydraulic arrangement shown, the larger piston has an area that is 50 times that of the... Problem 105E Problem 106E: Your friend says that the buoyant force of the atmosphere on an elephant is significantly greater... Problem 107E: When you replace helium in a balloon with hydrogen, which is less dense? Does the buoyant force on... Problem 108E Problem 109E Problem 110E: The force of the atmosphere at sea level against the outside of a 10-m2 store window is about 1... Problem 111E Problem 112E Problem 113E: What physics principle underlies the following three observations? When passing an oncoming truck on... Problem 114E: How does an airplane adjust its angle of attack so that it is able to fly upside down? Problem 115DQ: The photo shows physics teacher Marshall Ellen-stein walking barefoot on broken glass bottles in his... Problem 116DQ Problem 117DQ: Which teapot holds more liquid? Problem 118DQ: Suppose you wish to lay a level foundation for a home on hilly and bushy terrain. How can you use a... Problem 119DQ: If liquid pressure were the same at all depths, would there be a buoyant force on an object... Problem 120DQ: Compared to an empty ship, would a ship loaded with a cargo of Styrofoam sink deeper or less deeply... Problem 121DQ: A barge filled with scrap iron is in a canal lock. If the iron is thrown overboard, does the water... Problem 122DQ: A discussion of the following question raises some eyebrows: Why is the buoyant force on a submerged... Problem 123DQ: A balloon is weighted so that it is barely able to float in water. If it is pushed beneath the... Problem 124DQ: Greta Novak is treated to remarkable flotation in the very-salty Dead Sea. How does buoyant force on... Problem 125DQ: When an ice cube in a glass of water melts, does the water level in the glass rise, fall, or remain... Problem 126DQ: Count the tires on a large tractor-trailer that is unloading food at your local supermarket, and you... Problem 127DQ: Two teams of eight horses each were unable to pull the Magdeburg hemispheres apart (Figure 5.20).... Problem 128DQ: In the classroom demonstration at Lund University, a vacuum pump evacuates air from a large, empty... Problem 129DQ: If you bring an airtight bag of potato chips aboard an airplane, youll note that it puffs up as the... Problem 130DQ: On a sensitive balance, weigh an empty, flat, thin plastic bag. Then weigh the bag filled with air.... Problem 131DQ: Invoking ideas from Chapter 2 and this chapter, discuss why is it easier to throw a curve with a... Problem 132DQ: Your study partner says he doesn't believe in Bernoullis principle and cites as evidence the fact... Problem 1RAT: Choose the BEST answer to the question or the BEST way to complete the statement. 1. Water pressure... Problem 2RAT: The buoyant force that acts on a 20,000-N ship is (a) somewhat less than 20,000 N. (b) 20,000 N. (c)... Problem 3RAT: A floating duck displaces its own (a) volume of water. (b) weight of weight. (c) both of these (d)... Problem 4RAT: A rock suspended by a weighing scale weighs 15 N out of water and 10 N when submerged in water. What... Problem 5RAT: The two caissons of the Falkirk Wheel in Scotland (the device that lifts and lowers ships) remain in... Problem 6RAT: To what depth must an inverted drinking glass be pushed beneath the water surface to squeeze the... Problem 7RAT: Atmospheric pressure is caused by the atmosphere's (a) density. (h) weight. (c) temperature. (d)... Problem 8RAT: A hydraulic device multiplies force by 100. This multiplication is done at the expense of (a)... Problem 9RAT: The flight of a blimp best illustrates (a) Archimedes principle. (b) Pascals principle. (c)... Problem 10RAT: As water in a confined pipe speeds up, the pressure exerts against the inner walls of the pipe (a)... format_list_bulleted