Essential University Physics (3rd Edition)
3rd Edition
ISBN: 9780134202709
Author: Richard Wolfson
Publisher: PEARSON
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Chapter 15, Problem 80PP
To determine
How does the volume flow rate of blood at a stenosis compare with the rate in surrounding artery.
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Chapter 15 Solutions
Essential University Physics (3rd Edition)
Ch. 15.1 - What quantity of water has the same mass as 1 m3...Ch. 15.2 - Neglecting friction and other nonconservative...Ch. 15.3 - The density of a rubber ball is three-fifths that...Ch. 15.4 - The photo shows smoke particles tracing...Ch. 15.5 - A large tank is filled with liquid to the level h1...Ch. 15 - Why do your ears pop when you drive up a mountain?Ch. 15 - Commercial aircraft cabins are usually pressurized...Ch. 15 - Water pressure at the bottom of the ocean arises...Ch. 15 - The three containers in Fig. 15.22 are filled to...Ch. 15 - Why is it easier to float in the ocean than in...
Ch. 15 - Figure 15.23 shows a cork suspended from the...Ch. 15 - Meteorologists in the United States usually report...Ch. 15 - A mountain stream, frothy with entrained air...Ch. 15 - Why are dams thicker at the bottom than at the...Ch. 15 - Its not possible to breathe through a snorkel from...Ch. 15 - A helium-filled balloon stops rising long before...Ch. 15 - A barge filled with steel beams overturns in a...Ch. 15 - Why do airplanes take off into the wind?Ch. 15 - Is the flow speed behind a wind turbine greater or...Ch. 15 - The density of molasses is 1600kg/m3. Find the...Ch. 15 - Atomic nuclei have densities around 1017kg/m3,...Ch. 15 - Compressed air with mass 8.8 kg is stored in a...Ch. 15 - The pressure unit torr is defined as the pressure...Ch. 15 - Measurement of small pressure differencesfor...Ch. 15 - Whats the weight of a column of air with...Ch. 15 - A 4680-kg circus elephant balances on one foot. If...Ch. 15 - You unbend a paper clip made from 1.5-mm-diameter...Ch. 15 - Whats the density of a fluid whose pressure...Ch. 15 - A research submarine can withstand an external...Ch. 15 - Prob. 25ECh. 15 - A vertical tube open at the top contains 5.0 cm of...Ch. 15 - A child attempts to drink water through a...Ch. 15 - Barometric pressure in the eye of a hurricane is...Ch. 15 - Prob. 29ECh. 15 - A 5.4-g jewel has apparent weight 32 mN when...Ch. 15 - Styrofoams density is 160kg/m3. What percent error...Ch. 15 - A steel drum has volume 0.23 m3 and mass 16 kg....Ch. 15 - Water flows through a 2.5-cm-diameter pipe at 1.8...Ch. 15 - Show that pressure has the units of energy...Ch. 15 - A typical mass flow rate for the Mississippi River...Ch. 15 - Prob. 36ECh. 15 - A typical human aorta, the main artery from the...Ch. 15 - When a couple with total mass 120 kg lies on a...Ch. 15 - A fully loaded Volvo station wagon has mass 1950...Ch. 15 - Youre stuck in the exit row on a long flight, and...Ch. 15 - A vertical tube 1.0 cm in diameter and open at the...Ch. 15 - Dam breaks present a serious risk of widespread...Ch. 15 - A U-shaped tube open at both ends contains water...Ch. 15 - Prob. 44PCh. 15 - A garage lift has a 45-cm-diameter piston...Ch. 15 - Archimedes purportedly used his principle to...Ch. 15 - Youre testifying in a drunk-driving case for which...Ch. 15 - A glass beaker measures 14 cm high by 5.0 cm in...Ch. 15 - A typical supertanker has mass 2.0 106 kg and...Ch. 15 - A balloon contains gas of density and is to lift a...Ch. 15 - (a) How much helium (density 0.18 kg/m3) is needed...Ch. 15 - A 55-kg swimmer climbs onto a Styrofoam block of...Ch. 15 - If the blood pressure in the unobstructed artery...Ch. 15 - Youre a consultant for maple syrup producers. They...Ch. 15 - The water in a garden hose is at 140-kPa gauge...Ch. 15 - The venturi flowmeter shown in Fig. 15.26 is used...Ch. 15 - A 1.0-cm-diameter venturi flowmeter is inserted in...Ch. 15 - A balloons mass is 1.6 g when its empty. Its...Ch. 15 - Blood with density 1.06 g/cm3 and 10-kPa gauge...Ch. 15 - Prob. 60PCh. 15 - A drinking straw 20 cm long and 3.0 mm in diameter...Ch. 15 - In 2012, film producer James Cameron (Terminator,...Ch. 15 - Prob. 63PCh. 15 - Water emerges from a faucet of diameter d0 in...Ch. 15 - Assuming norm.nl atmospheric pressure, how massive...Ch. 15 - Figure 15.28 shows a simplified diagram of a Pitot...Ch. 15 - At a hearing on a proposed wind farm, a...Ch. 15 - A pencil is weighted so it floats vertically with...Ch. 15 - A can of height h and cross-sectional area A0 is...Ch. 15 - Density and pressure in Earths atmosphere are...Ch. 15 - (a) Use the result of Problem 70 to express...Ch. 15 - A circular pan of liquid with density is centered...Ch. 15 - A solid sphere of radius R and mass M has density ...Ch. 15 - The difference in air pressure between the inside...Ch. 15 - Find the torque that the water exerts about the...Ch. 15 - One vertical wall of a swimming pool is a regular...Ch. 15 - Youre a private investigator assisting a large...Ch. 15 - A plumber conies to your ancient apartment...Ch. 15 - Your class in naval architecture is working on the...Ch. 15 - Prob. 80PPCh. 15 - Prob. 81PPCh. 15 - Prob. 82PPCh. 15 - Prob. 83PP
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- A major artery with a cross-sectional area of 1.00 cm2 branches into 18 smaller arteries, each with an average cross-sectional area of 0.400cm2. By what factor is the average velocity of the blood reduced when it passes into these branches? 5/36 7/36 9/36 11/36 13/36arrow_forwardA major artery with a cross-sectional area of 0.95 cm2 branches into 18 smaller arteries, each with an average cross-sectional area of 0.39 cm2. By what factor is the average speed of the blood reduced when it passes into these branches? v2/v1=arrow_forwardThe radius of the lumen of the blood vessel decreased by 2.4%. Determine the ratio of the resulting flow resistance to the initial flow resistance of the vessel.arrow_forward
- (a) As blood passes through the capillary bed in an organ, the capillaries join to form venules (small veins). If the blood speed increases by a factor of 4.00 and the total cross-sectional area of the venules is 10.0 cm2, what is the total cross-sectional area of the capillaries feeding these venules? (b) How many capillaries are involved if their average diameter is 10.0 m?arrow_forward(a) Show that if the pressure drop remains constant, reduction of the radius of the arteriole from 0.1 to 0.08 mm decreases the blood flow by more than a factor of 2. (b) Calculate the decrease in the radius required to reduce the blood flow by 90%.arrow_forwardWhat blood vessels are known to have the slowest flow speed? Why is this important?arrow_forward
- Determine the erythrocyte sedimentation rate assuming that the erythrocytes have a spherical shape with a diameter of 8 microns. Take the blood density 1060 kg/m3, the density of the substance of erythrocytes 1090 kg/m3.arrow_forwardAn artificial kidney is a device that removes water and wastes from the blood. In one such device, i.e., the hollow fiber hemodialyzer, blood flows from an artery through the insides of a bundle of cellulose acetate fibers. Dialyzing fluid, which consists of water and various dissolved salts, flows on the outside of the fibers. Water and wastes-principally urea, creatinine, uric acid, and phosphate ions-pass through the fiber walls into the dialyzing fluid, and the purified blood is returned to a vein. At some time during the dialysis of a patient in kidney failure, the arterial and venous blood conditions are as follows: Flow rate (mL min-1) Urea concentration (mg mL-1) Arterial Blood-In 200 1.90 Venous Blood-Out 195 1.75 Calculate the rate at which water is being removed from the blood. Your answer should have units of mL/min.arrow_forwardThere are two carotid arteries that feed blood to the brain, one on each side of the neck and head. One patient’s carotid arteries are each 11.2 cm long and have an inside diameter of 5.2 mm. Near the middle of the left artery, however, is a 2.0-cmlong stenosis, a section of the artery with a smaller diameter of 3.4 mm. For the same blood flow rate, what is the ratio of thepressure drop along the patient’s left carotid artery to the drop along his right artery?arrow_forward
- Suppose blood is pumped from the heart at a rate of 5.4 L/min into the aorta of radius 1.2 cm. Suppose blood is pumped from the heart at a rate of 5.4 L/min into the aorta of radius 1.2 cm. v= cm/sarrow_forwardThe blood pressure in your heart is 1.71 x104 Pa. If an artery in the brain is 0.534 m above the heart, what is the pressure in the artery? Ignore any pressure changes due to blood flowarrow_forwardThe tympanic membrane, or eardrum, is a structure that separates the external and middle parts of the ear (see the figure). It is sensitive to and vibrates in response to changes in air pressure and transmits these vibrations to other structures in the inner ear that lead to the sensation of hearing: Under normal conditions, the pressure on the inside and outside of the tympanic membrane are kept approximately equal. The auditory tube, also called the Eustachian tube, is responsible for this equilibration. However, rapid changes in external pressure can cause large pressure differentials on the tympanic membrane, causing it to rupture. A differential force across the eardrum membrane as little as 5.0 N can cause a rupture. (a) If the cross-sectional area of the membrane is 1.0 cm², what is the maximum tolerable pressure difference between the external and inner ear? (b) Based on your answer in part (a), to what maximum depth could a person dive in fresh water before rupturing an…arrow_forward
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