Sentences with phrase «measure air density»

Not exact matches

By measuring the size of the largest raindrop imprints (inset) in ash that solidified soon after an eruption 2.7 billion years ago (pocked slab, main image) and comparing them to the imprints made by drops of various sizes and momentums in lab tests, the team estimates that the density of Earth's oxygen - free atmosphere 2.7 billion years ago most likely ranged between 50 % and 108 % of today's air and was certainly less than twice its modern density — a thickness insufficient to offset the dimness of the sun at the time.

The quality of the data set is enhanced by the possibility to combine the information from two different detectors: the particle density at the ground is measured with a surface array of water Cherenkov detectors whereas the longitudinal development of the air showers is observed with fluorescence telescopes during dark clear nights.

First, participants sit in a small machine, like this â $ BOD Pod.â $ Then, by measuring how much air is displaced by the individual, technicians can determine body density.

, its speed measured in nano seconds, the metal composition of the bullet, air density's ability to slow or speed the bullet, etc..

The method also provides a measure of the moisture content, the air - filled porosity, and the water permeability measured at the maximum media density.

For example, let's say that evidence convinced me (in a way that I wasn't convinced previously) that all recent changes in land surface temperatures and sea surface temperatures and atmospheric temperatures and deep sea temperatures and sea ice extent and sea ice volume and sea ice density and moisture content in the air and cloud coverage and rainfall and measures of extreme weather were all directly tied to internal natural variability, and that I can now see that as the result of a statistical modeling of the trends as associated with natural phenomena.

Thus a parcel of air into which water vapour is injected will rise without any change in ambient temperature.The reduction of density from surface upwards is what initially reduces air pressure as measured from the surface.

The kinetic energy density is a calculated measure of kinetic energy in the wind per unit volume of air.

If i measure IR temp from clouds above I find that its much colder (density of the air) than on the ground, so this is not where the IR is re-emitted to ground.

where L = latent heat of vaporization, ρ = density of air, qs = specific humidity at the surface, qr = specific humidity at a reference height, usually 10m, CDE = empirically measured aerodynamic humidity transfer coefficient (typically around 10 ^ -3 over the ocean), Ur = wind speed at the reference height.

Those factors included rates of motor vehicle accidents, uninsured adults and violent crime; the number of primary care doctors in an area and usage of hospice for the terminally ill; measures of air pollution, liquor store density and the percentage of high school and college graduates.

High levels of public transport density are usually accompanied by higher levels of traffic - related noise and air pollution, especially in urban environments typified by a concentration of tall buildings.54 Both excessive traffic - related noise and air pollution have been linked to stress, inability to psychologically restore and depression.55 56 One of the main features included in the measure of street connectivity used in this study was the presence of bridges, overpasses or tunnels.