The small capillaries in the lungs are in close contact with the alveoli. A redblood cell takes up oxygen during the 0.5 s that it squeezes through a capillary at the surface of an alveolus. What is the diffusion time for oxygen across the 1-μm-thick membrane separating air from blood? Assume that the diffusion coefficient for oxygen in tissue is 2 × 10-11 m2/s.

Q: f the density of air is 1.25 × 10-3 g/cc, what is the mass in kilograms of the air in a room that is…

A: Density of a matter: It is defined as ratio of mass of a matter to the volume. It is also defined…

Q: Some amount of a gas has a density of 1.60 kg/m³ at an absolute pressure of 95.0 kPa. What is the…

A:

Q: E- If barometer reads 762mmHg Open end Open end Gas Gas Ah-1.30 cm Ah-2.35 cm Closed end- D-…

A:

Q: A mixture of water (density=1000 kg/m3) and vapor flowing with a mass rate = 7 kg/sec in a pipe of…

A: Solution:-Given thatmass flow rate of mixture (m)=7 kg/sdensity of water (ρw)=1000 kg/m3length of…

Q: During inhalation, a person's diaphragm and intercostal muscles contract, expanding the chest cavity…

A: initial volume V1= 1220 mL final volume V2= 1220+485 mL V2= 1705 mL initial pressure P1= 1 atm let…

Q: A tube has a length of 0.043 m and a cross-sectional area of 6.5 x 10-4 m2. The tube is filled with…

A: Given data: Length of tube, L=0.043 m Cross-sectional area, A=6.5×10-4m2 Diffusion constant of…

Q: B lc A la Wa Given: The foam's density: p = 130 kg/ m³ The foam's thickness: t = 0.6 c m . Assume…

A: Let ρ denotes the density, lA denotes the plate A’s length, wA denotes the plate A’s width, t…

Q: You are an astronaut exploring a new planet in a distant solar system. This planet has an…

A: Given data: The atmospheric pressure on the planet is P=1000 mm of Hg. The oxygen content of the…

Q: A tank containing water is pressurized with air to a pressure of 30 psig. With the pressure in the…

A: Given: The initial pressure of tank is P1=30 psig. The initial rate of flow of water is Q1=15 GPM.…

Q: If the density of dry air is 1.28kg/m3 then what is the mass of the air in the room in kg that the…

A: Given data:  Density of air (ρ) = 1.28 kg/m3 Room dimensions =  14.1ft x 15.5ft x 12.0ft Required:…

Q: A fixed mass of a gas is held in an adjustable sealed container at a pressure of 100.0 kPa. If the…

A:

Q: Assuming that air contains 23.6 % of oxygen (O2) and 76.4 % of nitrogen (N2), find the density of…

A:

Q: The most dangerous particles in polluted air are those with diameters less than 2.5 μm because they…

A: Stoke's velocity is given by:

Q: The diffusion constant for the amino acid glycine in water is 1.06 × 10⁹ m²/s. In a 2.0-cm-long tube…

A: Fick's Law of DiffusionThe mass of a solute  diffusing into a solvent kept in a container of length…

Q: You are using a 680 W microwave to heat 700 ml of olive oil. If the initial temperature of the oil…

A: Microwave radiation causes rotational transitions in the molecules. By absorbing microwave…

Q: Atmospheric pressure on the peak of Kilimanjaro can be as low as 0.20 atm. If the volume of an…

A: Pressure at the peak is P1 = 0.20 atm Volume of the oxygen tank is V1 = 10.0 L Required volume of…

Q: (a) Find the average time (in s) required for an oxygen molecule to diffuse through a 0.195 mm thick…

A:

Q: A mixture of water (density =1000 kg/m3) and vapor flowing with a mass rate = 7 kg/sec in a pipe of…

A: Solution:-Given thatDensity of water (ρ)=1000 kg/m3mass flow rate of mixture (m)=7 kg/sGas fraction…

Q: Assuming a source-free region, derive the diffusion equation V²E = µo JE ot

A: A parabola partial differential equation is the diffusion equation. It is a term used in physics to…

Q: Carbon dioxide molecules have an average speed of 25.0m/s at a given temperature and pressure. What…

A: The average speed of molecules is given by, v¯ = 8RTπM where, R is the gas constant, T is the…

Q: The most dangerous particles in polluted air are those with diameters less than 2.5 μm because they…

A: The terminal velocity can be calculated using the equation, where  vT is the terminal velocity g is…

Q: A solution containing 3.76 x 1023 molecules/m3 of protein in water is separated from pure water by a…

A: To calculate the diffusion coefficient "D" of the protein, we can use Fick's Law of Diffusion, which…

Q: The diffusion constant for a substance in water has a value of 2.19 x10−9 m2/s. In a 3 cm long tube…

A:

Q: Many entertainers have facial tattoos. Assuming the ink is in the extracellular space, how long…

A:

Q: A deep-sea diver should breathe a gas mixture that has the same oxygen partial pressure as at sea…

A: a) The expression used to calculate partial pressure of oxygen is P=VVtPt Substitute values in the…

Q: With the temperature held constant, the pressure of a gas in a cylinder with a movable piston is…

A: In an isothermal…

Q: Automobile tire with a volume of 0.7 m3 is inflated to a gauge pressure of 250 . kPa. if the…

A: Given data Pg=250 kPaV=0.7 m3T=25°CPatm=100 kPa Here, Pg is the gauge pressure, V is the volume, T…

Q: The simple kinetic theory of gases may be used to drive the expression relating the pressure P to…

A: The pressure due to the gas in terms of density and the is given by  P = 13ρc2¯ here, ρ is the…

Q: Insects do not have lungs as we do, nor do they breathe through their mouths. Instead, they have a…

A: Given, Length, L=1.83 mm=0.00183 m,  Area, A=1.47×10-9 m2, Concentration of oxygen, Co=0.651 kg/m3,…

Q: During inhalation, a person's diaphragm and intercostal muscles contract, expanding the chest cavity…

A: Given that, The initial volume is V1=1290 mLThe initial pressure P1=1 atmThe chest cavity is…

Q: A gas is in a sealed container. The gas pressure is tripled and the temperature is doubled. By what…

A:

Q: The diffusion constant for a substance in water has a value of 1.66 x10−9 m2/s. In a 5.3 cm long…

A:

Q: A water molecule has a diameter of about 0.275 nm. How many hours would it take for a water molecule…

A:

Q: When you cough, you expel air at high speed through the trachea and upper bronchi so that the air…

A:

Q: During inhalation, a person's diaphragm and intercostal muscles contract, expanding the chest cavity…

A: The final volume is Vf=Vi+530 mL

Q: Consider the diffusion of a spherical particle in a liquid: D is the diffusion coefficient, ris the…

A: Write the expression for diffusion. D=kT6πrη

Q: During inhalation, a person's diaphragm and intercostal muscles contract, expanding the chest cavity…

A: Given: Initial volume, V1=1240 mL Final volume, V2=1240+515=1755 mL Initial pressure, P1=1 atm…

Q: A deep sea diver should breathe a gas mixture that has the same oxygen partial pressure as at sea…

A:

Q: A 2 cm diameter spherical fishing lure is cast into a pond and, though it submerges, it does not…

A:

Q: An automobile moving through the air causes the air velocity (measured with respect to the car) to…

A: The power needed is determined from the difference of the kinetic energies:

Q: A tube has a length of 0.045 m and a cross-sectional area of 5.9 x 10-4 m2. The tube is filled with…

A:

Q: An air bubble originating from an under water diver has a radius of 5 mm at some depth h. When the…

A:

Q: A deep sea diver should breathe a gas mixture that has the same oxygen partial pressure as at sea…

A: Partial pressure of oxygen is (20.9/100)*1.01*105 N/m2 = 2.12*104 N/m2

Q: At standard temperature and pressure, a gas has a density of 0.085 kg/m3.  What volume (in m3) does…

A: Given that   density (ρ) =0.085 kg/m3   M=1.03 kg What volume V (in m3) =?

Q: A tall graduated cylinder contains 7 cm of oil (density of 825 kg/m3kg/m3) on top of 20 cm of water…

A: According to the question,data is given below:-…

Q: 2. Methylene chloride is a common ingredient of paint removers. Besides being an irritant, it also…

A:

Q: ou can smell perfume very shortly after opening the bottle. To show that it is not reaching your…

A:

Human Metabolism

Being described as the most complicated machine ever encountered by humans, the human body and the cell metabolism is nothing less than a wonder. Metabolism is the set of life-sustaining chemical reactions within organisms.