Physics
5th Edition
ISBN: 9781260486919
Author: GIAMBATTISTA
Publisher: MCG
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Chapter 9, Problem 26P
(a)
To determine
The pressure in
(b)
To determine
The pressure in
(c)
To determine
The pressure in
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You inflate the front tires on your car to 28 psi. Later,you measure your blood pressure, obtaining a reading of 120/80, the readings being in mm Hg. In metric countries (which is to say, most of the world), these pressures are customarily reported in kilopascals (kPa). In kilopascals, what are (a) your tire pressure and (b) your blood pressure?
Systemic blood pressure is expressed as the ratio of the systolic pressure (when the heart first ejects blood into the arteries{max}) to the diastolic pressure (when the heart is relaxed{min}). Systemic pressure = Systolic pressure / diastolic pressure. Both pressures are measured at the level of the heart and are expressed in millimeters of mercury although the units are not written. Normal systemic blood pressure is 120/80. What are the maximum and minimum forces (in Newtons) that the blood exerts against each square centimeter of the heart for a person with high blood pressure, 145 / 85 ?
Note: this is a conversion question...follow the units.
Answer to 2 sig figs. (1.013 x 10^5 N/m^2 = 760 mmHg =1 atm) (1m = 100 cm)
maximum force = {Systolic}
minimum force = {Diastolic
Systemic blood pressure is expressed as the ratio of the systolic pressure (when the heart first ejects blood into the arteries{max}) to the diastolic pressure (when the heart is relaxed{min}). Systemic pressure = Systolic pressure / diastolic pressure. Both pressures are measured at the level of the heart and are expressed in millimeters of mercury although the units are not written. Normal systemic blood pressure is 120/80. What are the maximum and minimum forces (in Newtons) that the blood exerts against each square centimeter of the heart for a person with high blood pressure, 145 / 85 ?
Note: this is a conversion question...follow the units.
Answer to 2 sig figs. (1.013 x 10^5 N/m^2 = 760 mmHg =1 atm) (1m = 100 cm)
Chapter 9 Solutions
Physics
Ch. 9.2 - Prob. 9.2CPCh. 9.2 - Prob. 9.1PPCh. 9.3 - Prob. 9.2PPCh. 9.4 - Prob. 9.4CPCh. 9.4 - Prob. 9.3PPCh. 9.4 - Prob. 9.4PPCh. 9.5 - Prob. 9.5PPCh. 9.5 - Prob. 9.5CPCh. 9.6 - Prob. 9.6CPCh. 9.6 - Prob. 9.6PP
Ch. 9.6 - Prob. 9.7PPCh. 9.6 - Prob. 9.8PPCh. 9.7 - Prob. 9.7CPCh. 9.7 - Prob. 9.9PPCh. 9.8 - Prob. 9.8CPCh. 9.8 - Prob. 9.10PPCh. 9.8 - Prob. 9.11PPCh. 9.9 - Prob. 9.12PPCh. 9.10 - Prob. 9.10CPCh. 9.10 - Prob. 9.13PPCh. 9.11 - Prob. 9.14PPCh. 9 - Prob. 1CQCh. 9 - Prob. 2CQCh. 9 - Prob. 3CQCh. 9 - Prob. 4CQCh. 9 - Prob. 5CQCh. 9 - Prob. 6CQCh. 9 - Prob. 7CQCh. 9 - Prob. 8CQCh. 9 - Prob. 9CQCh. 9 - Prob. 10CQCh. 9 - Prob. 11CQCh. 9 - Prob. 12CQCh. 9 - Prob. 13CQCh. 9 - Prob. 14CQCh. 9 - Prob. 15CQCh. 9 - 16. What are the advantages of using hydraulic...Ch. 9 - 17. In any hydraulic system, it is important to...Ch. 9 - Prob. 18CQCh. 9 - Prob. 19CQCh. 9 - Prob. 20CQCh. 9 - Prob. 1MCQCh. 9 - Prob. 2MCQCh. 9 - Prob. 3MCQCh. 9 - Prob. 4MCQCh. 9 - Prob. 5MCQCh. 9 - Prob. 6MCQCh. 9 - Prob. 7MCQCh. 9 - Prob. 8MCQCh. 9 - Prob. 9MCQCh. 9 - Prob. 10MCQCh. 9 - Prob. 1PCh. 9 - Prob. 2PCh. 9 - Prob. 3PCh. 9 - Prob. 4PCh. 9 - Prob. 5PCh. 9 - Prob. 6PCh. 9 - 7. A nurse applies a force of 4.40 N to the piston...Ch. 9 - Prob. 8PCh. 9 - Prob. 9PCh. 9 - Prob. 10PCh. 9 - Prob. 11PCh. 9 - Prob. 12PCh. 9 - Prob. 13PCh. 9 - Prob. 14PCh. 9 - Prob. 15PCh. 9 - Prob. 16PCh. 9 - Prob. 18PCh. 9 - Prob. 17PCh. 9 - Prob. 19PCh. 9 - Prob. 20PCh. 9 - Prob. 21PCh. 9 - Prob. 22PCh. 9 - 23. A manometer using oil (density 0.90 g/cm3 ) as...Ch. 9 - Prob. 24PCh. 9 - Prob. 25PCh. 9 - Prob. 26PCh. 9 - Prob. 27PCh. 9 - Prob. 29PCh. 9 - Prob. 28PCh. 9 - Prob. 30PCh. 9 - Prob. 31PCh. 9 - Prob. 32PCh. 9 - Prob. 33PCh. 9 - Prob. 34PCh. 9 - Prob. 35PCh. 9 - Prob. 36PCh. 9 - Prob. 37PCh. 9 - Prob. 38PCh. 9 - Prob. 40PCh. 9 - Prob. 39PCh. 9 - Prob. 41PCh. 9 - Prob. 42PCh. 9 - Prob. 43PCh. 9 - Prob. 44PCh. 9 - Prob. 45PCh. 9 - Prob. 46PCh. 9 - Prob. 47PCh. 9 - Prob. 48PCh. 9 - Prob. 49PCh. 9 - Prob. 50PCh. 9 - Prob. 51PCh. 9 - Prob. 52PCh. 9 - Prob. 53PCh. 9 - Prob. 54PCh. 9 - Prob. 55PCh. 9 - Prob. 56PCh. 9 - Prob. 57PCh. 9 - Prob. 58PCh. 9 - Prob. 59PCh. 9 - Prob. 60PCh. 9 - Prob. 61PCh. 9 - Prob. 62PCh. 9 - Prob. 63PCh. 9 - Prob. 64PCh. 9 - Prob. 65PCh. 9 - Prob. 66PCh. 9 - (a) What is the pressure difference required to...Ch. 9 - Prob. 69PCh. 9 - Prob. 68PCh. 9 - Prob. 70PCh. 9 - Prob. 71PCh. 9 - Prob. 72PCh. 9 - Prob. 73PCh. 9 - Prob. 74PCh. 9 - Prob. 75PCh. 9 - Prob. 76PCh. 9 - Prob. 77PCh. 9 - Prob. 78PCh. 9 - Prob. 79PCh. 9 - Prob. 80PCh. 9 - Prob. 81PCh. 9 - Prob. 82PCh. 9 - Prob. 83PCh. 9 - Prob. 84PCh. 9 - Prob. 85PCh. 9 - Prob. 86PCh. 9 - Prob. 87PCh. 9 - Prob. 88PCh. 9 - Prob. 89PCh. 9 - Prob. 90PCh. 9 - Prob. 91PCh. 9 - Prob. 92PCh. 9 - Prob. 93PCh. 9 - Prob. 94PCh. 9 - Prob. 95PCh. 9 - Prob. 96PCh. 9 - Prob. 97PCh. 9 - Prob. 98PCh. 9 - Prob. 99PCh. 9 - Prob. 100PCh. 9 - Prob. 101PCh. 9 - Prob. 102PCh. 9 - Prob. 103PCh. 9 - Prob. 105PCh. 9 - Prob. 104PCh. 9 - Prob. 106PCh. 9 - Prob. 107PCh. 9 - Prob. 109PCh. 9 - Prob. 108PCh. 9 - Prob. 110PCh. 9 - Prob. 111PCh. 9 - Prob. 112PCh. 9 - Prob. 113PCh. 9 - Prob. 114PCh. 9 - Prob. 116PCh. 9 - Prob. 115PCh. 9 - A section of pipe with an internal diameter of...
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- Each time your heart beats, your blood pressure first increases and then decreases as the heart rests between beats. The maximum and minimum blood pressures are called the systolic and diastolic pressures, respectively. Your blood pressure reading is written as systolic/diastolic. A reading of 120/80 is considered normal.A certain person's blood pressure is modeled by the function p(t) = 125 + 25 sin(150?t) where p(t) is the pressure in mmHg (millimeters of mercury), at time t measured in minutes. (a) Find the period of p. min(b) Find the number of heartbeats per minute. heartbeats per minutearrow_forwardThe 30-cmcm-long left coronary artery is 4.6 mmmm in diameter. Blood pressure drops by 3.0 mmmm of mercury over this distance. What is the volume flow rate in L/minL/min through this artery?arrow_forwardThe pulmonary artery, which connects the heart to the lungs, has an inner radius of 2.5 mm and is 8.5 cm long. If the pressure drop between the heart and lungs is 380 Pa, what is the average speed of blood in the pulmonary artery? ?m/sarrow_forward
- 身 The 26-cm-long left coronary artery is 4.6 mm in diameter. Blood pressure drops by 3.0 mm Hg over this distance.arrow_forwardIn order to draw air into your lungs, your diaphragm and other muscles contract, increasing the lung volume. This lowers the air pressure of the lungs to below atmospheric pressure, and air flows in. When your diaphragm and other muscles relax, the volume of the lungs decreases, and air is forced out. (a) If the total volume of your lungs at rest is 5.31 L and the initial pressure is 749 mmHg, what is the new pressure if the lung volume is increased to 5.45 L? mmHg(b) If the total volume of your lungs at rest is 5.31 L and the initial pressure is 749 mmHg, at what volume will the pressure be 769 mmHg? Larrow_forwardThe human circulation system has approximately 1X109 capillary vessels. Each vessel hasa diameter of about 8μm. Assuming cardiac output is 5L/min, determine the averagevelocity of blood flow through each capillary vessel.arrow_forward
- An airplane passenger has a volume V1 of air in his stomach just before the plane takes off from a sea-level airport. What volume will this quantity of air have at cruising altitude at the same temprerature ( body temp. ), in terms of V1, the pressure on the ground P1, and the cabin pressure at cruising altitude P2? What is this volume, in cubic centimeters, if the initial volume is 110 cm^3 and the cabin pressure drops to 7.5x10^4 Pa when the plane is at cruising altitude?arrow_forwardGiven: Blood pressure is measured when the blood is pumping (systolic) and when the heart is resting (diastolic). When pressure readings are given, the systolic is given first, and healthy blood pressure is around 120 over 80 mm Hg. Recall the density of mercury is 13.6 × 103 kg/m3. Suppose you have a blood pressure reading of 119 over 83 mm Hg. What is your systolic pressure, in newtons per meter squared? Suppose you have a blood pressure reading of 119 over 83 mm Hg. What is your diastolic pressure, in newtons per meter squared?arrow_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_forward
- Suppose you measure a standing person’s blood pressure by placing the cuff on his leg 0.525 m below the heart. For this problem, assume that there is no loss of pressure due to resistance in the circulatory system (a reasonable assumption, since major arteries are large). The density of blood is 1.05×103 kg/m3. a. Calculate the systolic pressure you would observe, in units of mm Hgmm Hg, if the pressure at the heart was 120 over 80 mm Hg. Note that the top (and greater) number is the systolic pressure. b. Calculate the diastolic pressure you would observe, in units of mm Hgmm Hg, if the pressure at the heart was 120 over 80 mm Hg. Note that the bottom (smaller) number is the diastolic pressure.arrow_forwardL (a) The heart pumps blood into the aorta at a rate of 4 Calculate the average speed of blood if min the aorta's diameter is 2.1 cm. cm V blood 0.01198 S mm (b) The aorta branches many times until the blood finally reaches the smallest branch: the capillaries. Each capillary has an average diameter of 6.9 μm and the blood slows down to 0.5 the number of capillaries in the body. Does this answer look reasonable? Calculate S n = 1.8397X10 × capillaries caps (c) For what duration of time is a red blood cell in a capillary if the average capillary length is 1 mm? t = 167.06 Sarrow_forwardItem 12 The small capillaries in the lungs are in close contact with the alveoli. A red blood cell takes up oxygen during the 0 75 s that it squeezes through a capillary at the surface of an alveolus.arrow_forward
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