The density of water molecules within the leaf is typically 60 times greater than the density of carbon dioxide in the air, and the diffusion rate of the water molecule is greater than that of the carbon-dioxide molecule.
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During the dive, which takes up to four hours due to the high density of the water (it is filled with certain chemicals plus air pressure to simulate the circumstances found in space), the cosmonauts in training practice space walking -- and may lose a few kilos off their waist line in the strenuous process.
Mathilde is a rubble pile with a density very close to that of water.
This would create a fluid that, although a gas, would have a similar density and cutting power to that of water.
High population density, a poor ratio of available water to demand, and regional imbalances in available water supplies are serious challenges for China in managing its usable water supply.
Makers of plastic bottles for water and milk, for example, have faced a shortage of high-density polyethylene since the hurricanes.
Theories about why this is happening range from higher levels of obesity, higher density of calories in processed foods, and physical inactivity, to chemicals in food and water.
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This melt water has a relatively low density, so it accumulates in the top layer of the ocean.
Hyperpolarisation not only compensates for the low density of the gas (the 3He is 10, 000 times more polarised than the hydrogen in water), it also allows images to be taken rapidly enough to avoid any blurring due to a patient's natural tendency to breathe.
We have low population density, clean air, fresh water, fertile land, an ocean on either side and a grand total of two nations on our borders. (One of which is a also a huge, stable and peaceful nation with clean air, fresh water, and fertile land and even lower population density).
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