whats the density of the atmospehere?
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The density of air, ρ (Greek: rho) (air density), is the mass per unit volume of Earth's atmosphere, and is a useful value in aeronautics. In the SI system it is measured as the number of kilograms of air in a cubic meter (kg/m3). At sea level and at 20 °C dry air has a density of approximately 1.2 kg/m3. varying with pressure and temperature. Air density and air pressure decrease with increasing altitude.\n\nThe formula for the density of air is given by:\n\n P=p/R*T\nwhere ρ is the air density, p is pressure, R is the gas constant, and T is temperature.\n\nThe individual gas constant R for dry air is:\n\n R( dry air )=287.05J/kg*K\nTherefore:\n\nAt standard temperature and pressure (0 °C and 101.325 kPa), dry air has a density of ρSTP = 1.293 kg/m3. \nAt standard ambient temperature and pressure (25 °C and 100 kPa) dry air has a density of ρSATP = 1.168 kg/m3. \n[edit]\nEffect of water vapor\nFor moist air, the partial pressure of the water vapor must be considered as well. In this case, the density of the air is the sum of the density of the dry air and the density of the water vapor:\nP=pdry air /Rdry air*T+p water vapour/R water vapour*T\n \nThe gas constant for water vapor is:\nR water vapour=461.495 J/kg*K\n \nEffects of altitude\nTo calculate the density of air as a function of altitude, one requires additional parameters. They are listed below, along with their values according to the International Standard Atmosphere, using the universal gas constant instead of the specific one:\n\nsea level atmospheric pressure p0 = 101325 Pa = 1013.25 mbar or hPa = 101.325 kPa (= 101325 kg/(m*s2)) \nsea level standard temperature T0 = 288.15 K \nEarth-surface gravitational acceleration g = 9.80665 m/s2. \ndry adiabatic lapse rate L = −0.0065 K/m \nuniversal gas constant R = 8.31447 J/(mol·K) \nmolecular weight of dry air M = 0.0289644 kg/mol \nTemperature at altitude h metres above sea level is given by the following formula (only valid below the tropopause):\n\n T=To+L*H\nImportance of temperature\nThe below table demonstrates that the properties of air change significantly with temperature.\n\nTable — speed of sound in air c, density of air ρ, acoustic impedance Z vs. temperature °C\n\nImpact of temperature \n°C c in m/s ρ in kg/m³ Z in Pa·s/m \n- 10 325.4 1.341 436.5 \n- 5 328.5 1.316 432.4 \n0 331.5 1.293 428.3 \n+ 5 334.5 1.269 424.5 \n+ 10 337.5 1.247 420.7 \n+ 15 340.5 1.225 417.0 \n+ 20 343.4 1.204 413.5 \n+ 25 346.3 1.184 410.0 \n+ 30 349.2 1.164 406.6
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as you know the density of ice and water is slightly different.\n\nmultiply the height by the ratio of densities, i.e. density of water/density of snow.\n\nIce has a density of 0.917 g/cm³ at 0 °C, whereas water has a density of 0.9998 g/cm³ at the same temperature
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Atmospheric characteristics\nAtmospheric pressure 140 kPa\nHydrogen> 93%\nHelium >5%\nMethane 0.2%\nWater vapor 0.1%\nAmmonia 0.01%\nEthane 0.0005%\nPhosphine 0.0001%
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density=mass/volume or something like that, so if u have the density and the volume (aproximations ofcourse) u can find the mass\n\ni think! lol
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Maybe this explanation can help? http://en.wikipedia.org/wiki/Spectral_density
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http://www.continuinged.ku.edu/isc/atmo.html
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Saturn has a density less than water.  It's density is 0.6873 g/cm^3.  Water has a density of 1g/cm^3.
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density=mass/volume\n\nd=125.6g/750cm^3=.1674g/cm^3\n\napproximately .167g/cm^3 (dont forget the cubed. if u forget it u'll get it wrong)
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The National Oceanic and Atmospheric Administration (NOAA) provides some estimates of air and cloud density and weight. NOAA found that dry air has a density of about 1.007 kilograms/cubic meter (kg/m3), moist air comes in at about 0.627 kg/m3, and the density of the actual cloud droplets is about 0.0005 kg/m3. The density of the cloud is thus about 62 percent of dry air. In the final calculations, the 1 km3 cumulus cloud weighs a whopping 1.4 billion pounds (635 million kilograms)! But the cloud floats because the weight of the same volume of dry air is even more, about 2.2 billion pounds (1 billion kilograms). Still, remember that it is the lesser density of the cloud that allows it to float on the dryer and more-dense air.
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Water has a density maxima at 4C
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It measures the density of cumulative clouds. Good Luck !  :)
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near zero. \n\nExcept that there is some mass in space, - like space dust. And there's the solar wind pushing outwards.
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Density = 5,515 kg/m³
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by lightest im assuming least dense.\naerogel has the lowest density of any object known to man,1.9 mg/cm3. it consists of .2%silicon dioxide 99.8% air. it is an incredibly good insulator and used a lot in space equipment
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Volume of the balloon * density of the gas = mass of gas in the balloon
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http://www.answers.com/topic/density?method=22\nhttp://www.reference.com/search?q=density
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The density of a gas and dust in a random part of space in our galaxy is so low that on Earth our best attempts to create a vaccum are much more dense.\n\nThe average density of space is about 1 atom per cubic centimeter (more or less the size of a sugar cube) although it can vary from one tenth of that to "dense" regions with 1000 atoms per cubic centimeter.