To insura sufficient oxygen diffusion the lungs contain hundreds of millions of miniature balloon like projections. This increases the lungs surface area to approximately how many square meters?

Q: A typical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 9.000…

A: (a) Total Volume  V = 4/3*pi*r^3 = 4/3*pi*(12 um) ^3 = 7238.23 um^3

Q: The density of bubble gum is about 1g/cm3. You blow an 8g wad of gum into a bubble 9cm in diameter.…

A: Given: The density of bubble gum is  ρ=1 g/cm3, The mass of gum is m=8 g, The diameter of the…

Q: he basic function of an automobile's carburetor is to atomize the gasoline and mix it with air to…

A: Given volume (V)=40 cm3Radius of each droplet (R)=2.0×10-5 m=0.002 cm

Q: Assuming biological substances are 100% water, estimate the mass of a human kidney. Take a kidney to…

A: Mass of a Human kidney

Q: he standard kilogram is a platinum-iridium cylinder 39 mm in height and 39 mm in diameter. What is…

A: The volume of the cylinder is V=πr2h .......................... (1)  where V is the volume, r is the…

Q: What quantity defines the difference between the internal diameter and the external diameter of a…

A: Answer: The thickness of the mug defines the difference between the internal diameter and the…

Q: a) What is the volume (in km3) of Avogadro's number of sand grains if each grain is a cube and has…

A:

Q: Assume an oil drop has a volume of 0.15 cm^3 . If you had Avogadro’s number (6.022 x 1023) of oil…

A:

Q: A study room has dimensions of 8 m by 10 m and 3.5 m tall. The air in the room is to be exchanged 7…

A: Given: dimension of room: 8 m × 10 m × 3.5 m velocity of air, v = 8.3 m/s time taken to remove air 7…

Q: Q 2: a- If you had 0.2 kg of helium, how many helium atoms would you have? b- If you had 10…

A: Solution- (A) mass of helium, m = 0.2 kgmolar mass of helium = 4 gm =0.004 kgNo. of moles, n = 0.2…

Q: Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin…

A:

Q: Calculate the volume of the tube which represents the stagnant volume this will become the accepted…

A: The direct consequence of Boyle’s law, at a constant temperature, is that the volume (V) of a…

Q: Grains of fine California beach sand are approximately spheres with an average radius of 50 pm and…

A: The problem is asking to find the mass of sand grains that would have a total surface area equal to…

Q: during heavy rain, a section of a mountainside measuring 3.1 km wide horizontally, 1.1 km up along…

A: Given data -    density of the mud ( ρ ) = 1900kg/m3                        surface area of the…

Q: Approximately the maximum number of cylinders with a radius of 4 cm and a height of 4 cm which can…

A:

Q: Grains of fine California beach sand are approximately spheres with an average radius of 50 μm and…

A:

Q: stimate how many molecules of air are in each 2.5-L breath you inhale that were also in the last…

A: Given: The breath is 2.5 L. The height of the atmosphere is 10 km.

Q: One mole of Gold (Au) atom has a mass of 197 g. We know that the density of gold is 19.30 g/cm3 in…

A:

Q: The density of platinum is 21.45 x 103 kg/m3. a. Calculate the volume (in m3/atom) occupied per…

A:

Q: The density of bubble gum is about 1g/cm3. You blow an 8g wad of gum into a bubble 9cm in diameter.…

A:

Q: A typical sugar cube has an edge length of 1 cm. If you had a cubical box that contained a mole of…

A: The length of the sugar cube is 1 cm.

Q: A snowman is made from three spheres of packed snow stacked on one another. Assume each sphere has a…

A:

Q: A typical bathroom sink faucet releases about two gallons of water every minute.   a) If it takes…

A: Given, faucet releases water in 1 minute= 2 gallons. a) To find, water used in 2.5 minutes. In 1…

Q: Grains of fine California beach sand are approximately spheres with an average radius of 50 μm and…

A:

Q: Fat cells in humans are composed almost entirely of pure triglycerides with an average density of…

A:

Q: If the density (mass divided by volume) of the wall material is the same as that of pure water, what…

A: Given Density (s)= mass(m)/volume (V) And s= 1000kg/m3.        Density of water is 1000kg/m3 Now let…

Q: (a) What is the volume (in km3 ) of Avogadro’s number of sand grains if each grain is a cube and has…

A: Given:  sand grain is cube of side 1 mm

Q: (a) There are about 3 × 10 25 molecules of air in each cubic meter of the atmosphere. If each…

A:

Q: A spherical snowball is melting in such a way that its radius is decreasing at rate of 0.3 cm/min.…

A:

Q: Grains of fine California beach sand are approximately spheres with an average radius of 50 m and…

A:

Q: On average, each person in the industrialized world is responsible for the emission of 10,000 kg of…

A: Mass of CO2 emulled for energy personevery year = 10,000 kgTremperature = 20°c…

Q: density of platinum is 21.45 x 103 kg/m3. a. Calculate the volume (in m3/atom) occ

A: density= mass/volume