FUND.OF PHYSICS(LL)-PRINT COMP-W/ACCESS
11th Edition
ISBN: 9781119459170
Author: Halliday
Publisher: WILEY
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Chapter 14, Problem 84P
When you cough, you expel air at high speed through the trachea and upper bronchi so that the air will remove excess mucus lining the pathway. You produce the high speed by this procedure: You breathe in a large amount of air, trap it by closing the glottis (the narrow opening in the larynx), increase the air pressure by contracting the lungs, partially collapse the trachea and upper bronchi to narrow the pathway, and then expel the air through the pathway by suddenly reopening the glottis. Assume that during the expulsion the volume flow rate is 7.0 × 10−3 m3/s. What multiple of 343 m/s (the speed of sound vs) is the airspeed through the trachea if the trachea diameter (a) remains its normal value of 14 mm and (b) contracts to 5.2 mm?
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When you cough, you expel air at high speed through the trachea and upper bronchi so that the air will remove excess mucus lining the pathway.You produce the high speed by this procedure:You breathe in a large amount of air, trap it by closing the glottis (the narrow opening in the larynx), increase the air pressure by contracting the lungs, partially collapse the trachea and upper bronchi to narrow the pathway, and then expel the air through the pathway by suddenly reopening the glottis. Assume that during the expulsion the volume flow rate is 7.0 * 10-3 m3/s.What multiple of 343 m/s (the speed of sound vs) is the airspeed through the trachea if the trachea diameter (a) remains its normal value of 14 mm and (b) contracts to 5.2 mm?
If you blow a thin stream of air with a speed of 7.2 m/s out of your mouth, what is the overpressure in your mouth? Assume that the speed of the air in your mouth is (nearly) zero.
During inhalation, a person's diaphragm and intercostal muscles contract, expanding the chest cavity and lowering the internal air pressure below ambient so that air flows in through the mouth and nose to the lungs. Suppose a person's lungs hold 1220 mL of air at a pressure of 1.00 atm. If they expand their chest cavity by 485 mL while keeping their nose and mouth closed so that no air is inhaled, what will be the air pressure in their lungs in atm? Assume the air temperature remains constant.
atm
Chapter 14 Solutions
FUND.OF PHYSICS(LL)-PRINT COMP-W/ACCESS
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When a person...Ch. 14 - SSM Crew members attempt to escape from a damaged...Ch. 14 - In Fig. 14-32, an open tube of length L = 1.8 m...Ch. 14 - GO A large aquarium of height 5.00 m is filled...Ch. 14 - The L-shaped fish tank shown in Fig. 14-33 is...Ch. 14 - SSM Two identical cylindrical vessels with their...Ch. 14 - Prob. 22PCh. 14 - GO In analyzing certain geological features, it is...Ch. 14 - GO In Fig. 14-35, water stands at depth D = 35.0 m...Ch. 14 - In one observation, the column in a mercury...Ch. 14 - To suck lemonade of density 1000 kg/m3 up a straw...Ch. 14 - SSM What would be the height of the atmosphere if...Ch. 14 - A piston of cross-sectional area a is used in a...Ch. 14 - In Fig 14-37, a spring of spring constant 3.00 ...Ch. 14 - A 5.00 kg object is released from rest while fully...Ch. 14 - SSM A block of wood floats in fresh water with...Ch. 14 - In Fig. 14-38, a cube of edge length L = 0.600 m...Ch. 14 - SSM An iron anchor of density 7870kg/m3 appears...Ch. 14 - A boat floating in fresh water displaces water...Ch. 14 - Three children, each of weight 356 N, make a log...Ch. 14 - GO In Fig. 14-39a, a rectangular block is...Ch. 14 - ILW A hollow spherical iron shell floats almost...Ch. 14 - GO A small solid ball is released from rest while...Ch. 14 - SSM WWW A hollow sphere of inner radius 8.0 cm and...Ch. 14 - Lurking alligators. An alligator waits for prey by...Ch. 14 - What fraction of the volume of an iceberg density...Ch. 14 - A Flotation device is in the shape of a right...Ch. 14 - When researchers find a reasonably complete fossil...Ch. 14 - A wood block mass 3.67 kg, density 600 kg/m3 is...Ch. 14 - GO An iron casting containing a number of cavities...Ch. 14 - GO Suppose that you release a small ball from rest...Ch. 14 - The volume of air space in the passenger...Ch. 14 - GO Figure 14-44 shows an iron ball suspended by...Ch. 14 - Prob. 49PCh. 14 - Figure 14-46 shows two sections of an old pipe...Ch. 14 - SSM A garden hose with an internal diameter of 1.9...Ch. 14 - Two streams merge to form a river. One stream has...Ch. 14 - SSM Water is pumped steadily out of a flooded...Ch. 14 - GO The water flowing through a 1.9 cm inside...Ch. 14 - How much work is done by pressure in forcing 1.4...Ch. 14 - Suppose that two tanks, 1 and 2, each with a large...Ch. 14 - SSM A cylindrical tank with a large diameter is...Ch. 14 - The intake in Fig. 14-47 has cross-sectional area...Ch. 14 - SSM Water is moving with a speed of 5.0 m/s...Ch. 14 - Models of torpedoes are sometimes tested in a...Ch. 14 - ILW A water pipe having a 2.5 cm inside diameter...Ch. 14 - A pitot tube Fig. 14-48 is used to determine the...Ch. 14 - Prob. 63PCh. 14 - GO In Fig. 14-49, water flows through a horizontal...Ch. 14 - SSM WWW A venturi meter is used to measure the...Ch. 14 - Consider the venturi tube of Problem 65 and Fig....Ch. 14 - ILW In Fig. 14-51, the fresh water behind a...Ch. 14 - GO Fresh water flows horizontally from pipe...Ch. 14 - A liquid of density 900 kg/m3 flows through a...Ch. 14 - GO In Fig. 14-53, water flows steadily from the...Ch. 14 - Figure 14-54 shows a stream of water flowing...Ch. 14 - GO A very simplified schematic of the rain...Ch. 14 - About one-third of the body of a person floating...Ch. 14 - A simple open U-tube contains mercury. When 11.2...Ch. 14 - If a bubble in sparkling water accelerates upward...Ch. 14 - Suppose that your body has a uniform density of...Ch. 14 - Prob. 77PCh. 14 - Caught in an avalanche, a skier is fully submerged...Ch. 14 - An object hangs from a spring balance. The balance...Ch. 14 - In an experiment, a rectangular block with height...Ch. 14 - SSM Figure 14-30 shows a modified U-tube: the...Ch. 14 - What is the acceleration of a rising hot-air...Ch. 14 - Figure 14-56 shows a siphon, which is a device for...Ch. 14 - When you cough, you expel air at high speed...Ch. 14 - A tin can has a total volume of 1200 cm3 and a...Ch. 14 - The tension in a string holding a solid block...Ch. 14 - What is the minimum area in square meters of the...Ch. 14 - A 8.60 kg sphere of radius 6.22 cm is at a depth...Ch. 14 - a For seawater of density 1.03 g/cm3, find the...Ch. 14 - The sewage outlet of a house constructed on a...
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