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21%
using CNG in vehicles, using catalytic convertors
Non-newtonian fluids would fit this description. A non-newtonian fluid is a combination between a solid and a liquid. An example would be water mixed with cornstarch. A. solution is form when solute is dissolve in solvent. it is not necessary that solution is always form between solid in liquid or liquid in liquid. there are some examples of solution that are not liquid. e.g solution of Gas (solute) in Gas (solvent) EXAMPLE Air. solution of solid (solute) in solid (solvent) EXAMPLE carbon in iron or steel. solution of solid (solute) in gas (solvent) EXAMPLE dust particles in smoke.
Im trying to figure that out to for my science project go to www.earthquake.usgs.gov/regional/states/events/1811_overview.php and it will help you out! :)
The vapour pressure of a substance is related to how fast it is evaporating. Vapour pressure varies directly with temperature. The hotter it is, the higher the vapour pressure. A substance boils when the vapour pressure of the liquid equals atmospheric pressure pushing down on the substance: usually taken to be 760 mm Hg or 101 kPa. If you know the vapour pressure of a substance you can estimate how much of that substance would be in air above the substance if you put it in a closed room and allowed it to equilibrate. This is called the saturated vapour concentration. If you know for instance that the lower flammable limit of the substance is 0.5% (1% = 10,000 ppm), you would be concerned about the potential for fire if the saturated vapour concentration was greater than 5000 ppm at room temperature. Without ventilation, there would be enough of the substance in air to ignite if there is a source of ignition. In a similar way, if the allowable exposure limit for the substance was an 8-hour time-weighted average of 500 ppm, you would know that it is possible to be overexposed to the substance by inhalation if the saturated vapour concentration exceeds 500 ppm. Estimate the saturated vapour concentration (SVC) using the following formula: SVC = [(vapour pressure of substance in mm Hg)/ 760 mm Hg] X 10^6 Ed Gatey BSc (Chem), CRSP, CIH
21
15 in the hexadecimal number system is represented by 21 in the decimal system.
The winter solstice.
icosikaihena
Icosikaihenagon
Flash point of 21 C or below
You multiply 21 times itself three times: 21 x 21 x 21 = 9,261.
21/4 is not a whole number and it cannot be represented as consecutive whole numbers.
21
Petri Kokko - figure skater - was born on 1966-02-21.
Owen Edwards - figure skater - was born on 1987-07-21.
Neil Paterson - figure skater - was born on 1964-04-21.