Sentences with phrase «average density»
Average density refers to how tightly packed or compact a substance or object is. It is calculated by dividing the mass of an object by its volume. A higher average density means that the object is more dense or has more mass for a given volume, while a lower average density indicates that it is less dense or has less mass for the same volume. Full definition
States like California and New York have high average densities of 251 and 420 people per square mile because of the millions of people crammed into major cities.
businessinsider.com
The star's calculated average density is 92,000 times that of Sol's, so that one cubic inch of its material would weigh about 15 tons at the surface of the Earth.
The stars of a T association form from loose aggregates of small molecular cloud cores a few tenths of a light - year in size that are randomly distributed through a larger region of lower average density.
The planet's mass and diameter are consistent with the hypothesis that it has a low average density due to an inferred composition of three - fourths water (possibly 47 percent) and other ices (that have subliminated into a «supercritical fluid» above an «electronically conductive,» dense fluid plasma below a steamy atmosphere) and one - fourth rock and iron in the core.
Using distance sampling methodology, we built statistical models of cetacean density — the number of individual animals found per square kilometer of area — from environmental variables for 26 species and 3 multi-species guilds, and produced maps showing average density across the modeled region.
There were 4,322 housing units at an average density of 121.7 per square mile (47.0 / km ²).
There are 35,030 housing units at an average density of 58 / km (152 / mi).
There were 64,900 housing units at an average density of 61 per square mile (24 / km ²).
The shape of the universe can be determined by measuring the average density of matter within it, assuming that all matter is evenly distributed, rather than the distortions caused by «dense» objects such as galaxies.
We now know the shape of the universe (flat) and the average density of matter and energy (critical density), and yet we don't know what will happen.
Before we discovered that the universe's expansion was accelerating, predicting our cosmic fate seemed straightforward: Measure the slowing of the expansion, the average density of matter and energy, or the shape of the universe.
Trillions of years from now, matter will be so widely spread out that its average density will be much less than a single electron per quadrillion cubic light - years of space.
Here the degree of aggregation in the distribution of 1768 tree species is examined based on the average density of conspecific trees in circular neighborhoods around each tree.
«Using the average density of uncompacted plastic waste, 8 million metric tons — the midpoint of our estimate — would cover an area 34 times the size of Manhattan ankle - deep in plastic waste,» said co-author Roland Geyer, an associate professor at UCSB's Bren School of Environmental Science & Management.
But one afternoon, the whales all converged on one place where there was a really high density of prey — a 40 - meter - thick swath of water with 107 grams of krill per cubic meter, as opposed to the average density of 66 grams per cubic meter, Cade reported at the meeting.
These predictions match the observed cosmic composition if the modern universe has an average density of 0.2 hydrogen atoms per cubic meter — far less than the amount of matter seen around galaxies and galaxy clusters.
Having the mass and radii of a planet allows the astronomers to calculate other features such as a planet's average density, «and once you know the average density of a planet, then you can start to say whether it's rocky or not,» Kane explained.
Intergalactic space (the space between galaxies) is filled with a tenuous gas of an average density less than one atom per cubic metre.
The team found that, compared with the average density of particle strikes across the whole sky, about 6 percent fewer particles came from the center of the Milky Way.
The electron density there is about four times the average density of the conduction electrons in copper wire.
Finally, they calculated the population's turnover rate to estimate an average density of 50 clams per square meter over the last millennium — a number that contrasts with fieldwork earlier this year that yielded just three clams per square meter, they report in the December issue of Geology.
As the universe expands, the average density of matter decreases; therefore, the density was much higher in the past, in particular exceeding nuclear levels within the first microsecond of the big bang.
Using the mass and the volumes, compute the average density of the aluminum sheet for each diameter by dividing mass by volume.
The galaxy overdensity with respect to the average density is shown by the contour.
On a larger scale, the Sun belongs to another irregularity — our Galaxy, an aggregate of stars with a density about a hundred thousand times greater than the average density of matter in the Universe.
With a planet's mass and radius in hand, astronomers can calculate its average density, which gives them a handle on what it is made of.
Its value is a combination of the size of density fluctuations in, and the average density of, a section of the Universe.
That in turn means it is much more compact than Jupiter, which has an average density only slightly greater than water.
Radar reflectivity depicting the average densities of waterfowl gathered in agricultural fields and wetlands during the winter of 2014 - 15 near Sacramento, California.
The overlaid contours represent the average density of the dense gas.
We know from their average density that Uranus and Neptune have a lot of water, but exactly how they are put together is a big mystery.
Having so much mass packed within a ball on the order of 20 km (12 miles) in diameter, a neutron star has a density that can reach that of nuclear values, which is roughly 100 trillion (1014) times the average density of solar matter or of water.
Because Sirius B is so faint, its surface area and thus its volume must be very small, and its average density is on the order of 100,000 times that of water.
Near the Sun the average density of interstellar gas is 10 − 21 gm / cm3, which is the equivalent of about one hydrogen atom per cubic centimetre.
If we don't know its physical size, we can't calculate its average density and therefore there's ambiguity as to what materials it contains.
Densitometry analysis of the antibody bands was conducted to compare the average density between central and peripheral bands.
The average density of measurements utilized in this study is 290 points km - 2, while the average density of measurements used in assessing the mass balance in the accumulation zone of other Canadian, Norwegian, Swiss and United States glaciers is 33 points / km -2 (Meier, et al., 1971; Pytte, 1969)(Table 1).
In assessing the mass balance in the accumulation zone of Canadian, Norwegian, Swiss and United States glaciers the average density of measurements is 16 points / km2 (Pelto, 1996).
if more mass were added to the atmosphere so as to avoid reducing the average density of the atmosphere when expansion occurred.
The average density of measurements by the NCGCP in the accumulation zone of each glacier ranges from 180 - 300 points km2 (Pelto, 1996; 2000).