BIO CALCULATING LUNG VOLUME IN HUMANS. In humans, oxygen and carbon dioxide are exchanged in the blood within many small sacs called alveoli in the lungs. Alveoli provide a large surface area for gas exchange. Recent careful measurements show that the total number of alveoli in a typical pair of lungs is about 480 × 10 6 and that the average volume of a single alveolus is 4.2 × 10 6 μ m 3 . (The volume of a sphere is V = 4 3 π r 3 , and the area of a sphere is A = 4 πr 2 .) 1.92 What is total volume of the gas-exchanging region of the lungs? (a) 2000 μ m 3 ; (b) 2 m 3 ; (c) 2.0 L; (d) 120 L.
BIO CALCULATING LUNG VOLUME IN HUMANS. In humans, oxygen and carbon dioxide are exchanged in the blood within many small sacs called alveoli in the lungs. Alveoli provide a large surface area for gas exchange. Recent careful measurements show that the total number of alveoli in a typical pair of lungs is about 480 × 10 6 and that the average volume of a single alveolus is 4.2 × 10 6 μ m 3 . (The volume of a sphere is V = 4 3 π r 3 , and the area of a sphere is A = 4 πr 2 .) 1.92 What is total volume of the gas-exchanging region of the lungs? (a) 2000 μ m 3 ; (b) 2 m 3 ; (c) 2.0 L; (d) 120 L.
BIO CALCULATING LUNG VOLUME IN HUMANS. In humans, oxygen and carbon dioxide are exchanged in the blood within many small sacs called alveoli in the lungs. Alveoli provide a large surface area for gas exchange. Recent careful measurements show that the total number of alveoli in a typical pair of lungs is about 480 × 106 and that the average volume of a single alveolus is 4.2 × 106μm3. (The volume of a sphere is
V
=
4
3
π
r
3
, and the area of a sphere is A = 4πr2.)
1.92 What is total volume of the gas-exchanging region of the lungs? (a) 2000 μm3; (b) 2 m3; (c) 2.0 L; (d) 120 L.
A spherical balloon is partially blown up and its surface area is measured. More air is then added, increasing the volume of the balloon. If the surface area of the balloon expands by a factor of 9.90 during this procedure, by what factor does the radius of the balloon increase?
Calculating lung volume in humans. In humans, oxygen and carbon
dioxide are exchanged in the blood within many small sacs called alveoli
in the lungs. Alveoli provide a large surface area for gas exchange. Recent
careful measurements show that the total number of alveoli in a typical
pair of lungs is about 480 x 10 6 and that the average volume of a single
alveolus is 4.2 x 10 6 cubic micrometer.
The density of platinum is 21.45 x 103 kg/m3.
a. Calculate the volume (in m3/atom) occupied per platinum atom
b. Estimate the atomic diameter (in m);(The estimate uses the approximation that it is a cubic volume)
c. Using this estimation, calculate the thickness of a metal foil (in m) containing 2.0 x 101 atomic layers of platinum.
Chapter 1 Solutions
University Physics with Modern Physics, Volume 2 (Chs. 21-37); Mastering Physics with Pearson eText -- ValuePack Access Card (14th Edition)
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