A young male adult takes in about 5.64 x 104 m³ of fresh air during a normal breath. Fresh air contains approximately 21% oxygen.Assuming that the pressure in the lungs is 1.01 x 105 Pa and air is an ideal gas at a temperature of 310 K, find the number of oxygenmolecules in a normal breath.Number iUnits

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Answered: A young male adult takes in about 5.64…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter1: Getting Started

Section: Chapter Questions

Problem 1PQ: The average life expectancy in Japan is 81 years. What is this time in SI units?

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(a) About how many microorganisms are found in the human intestinal tract? (A typical bacterial length scale is one micron = 106 m. Estimate the intestinal volume and assume bacteria occupy one hundredth of it.) (b) Discuss your answer to part (a). Are these bacteria beneficial, dangerous, or neutral? What functions could they serve?
For each of the following scenarios, refer to Figure 1.4 and Table 1.2 to determine which metric prefix on the meter is most appropriate for each of the following scenarios. (a) You want to tabulate the mean distance from the Sun for each planet in the solar system. (b) You want to compare the sizes of some common viruses to design a mechanical filter capable of blocking the pathogenic ones. (c) You want to list the diameters of all the elements on the periodic table. (d) You want to list the distances to all the stars that have now received any radio broadcasts sent from Earth 10 years ago. 1.2 Units and Standards
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The basal metabolism of a resting adult is approximately 100 W. Most of this is provided by the hydrolysis of ATP, which in resting muscle has an estimated energy release of 60 kJ/mol.
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The pressure, P of an ideal gas, can be expressed as P = nRT/V where n is the number of moles, T is the temperature, V is the volume and R = 8.314JK^-1 mol^-1 is the ideal gas constant. a) Find the expression for deltaP in terms of deltan, deltaT and deltaV: deltaP = deltan + deltaT + deltaV b) Suppose that n = 1, V = 1m^3 and T = 300K initially. If n and V change to 9/5 and 7/10m^3 respectively, estimate the change in T(K) required to keep P constant.
The density of bubble gum is about 1g/cm3. You blow an 8g wad of gum into a bubble 9cm in diameter. What is the thickness of the bubble? Use the equation: 4πr2 to help solve the problem
Suppose you have a culture of bacteria, where the density of each bacterium is 2.0 g/cm³. a. If each bacterium is 5µm × 5µm × 20µm in size, find the number of bacteria if their total mass is 30 grams. Recall that 1µm = 10−6 meters. b. Suppose that you learn that the sizes of bacteria range from 4µm × 5µm × 15µmto5µm × 6µm × 25µm. What is the range of the possible number of bacteria making up the total mass of 30 grams?
A population of E. coli bacteria grows exponentially with time. You believe that the mean time between divisions is t, = 26 min, and that cell death occurs on average after tm = 200 hr. The population starts with 1000 cells. Complete parts (a) through (c). (a) Use the equation N(t) = N, e0-m)t to predict how many cells are present after 3 hours. The number of cells present after 3 hours is. (Do not round until the final answer. Then round to the nearest integer as needed.)
1

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