The phrase "actual density" is correct and usable in written English.
It can be used in scientific or technical contexts to refer to the true density of a substance, as opposed to an estimated or theoretical value.
Example: "The actual density of the material was measured to be significantly higher than previously thought."
Alternatives: "true density" or "real density".
The actual density of the universe is something that has been changing over the course of the universe's history.
However, these models do not annotate the actual density values of the atoms nor their positional uncertainty.
The ratio of the actual density to this critical density is a number that is referred to as omega.
(Both numbers have been getting smaller). But whether or not the actual density of the universe is greater than the critical density is something that doesn't change.
If the actual density of the Universe is exactly the critical density, then the Universe is said to be flat and will keep on expanding.
Considering the actual density and thickness of each concrete sample index - I ρd) values are lower than index I values.
In a recent study, a light sheet imaging approach has been proposed (Hartung et al., J. Appl. Phys. B 96 (2009) 843 862) which permits measurement of a quantity S∗2Dd, which is the two-dimensional projection of the actual density-weighted displacement speed S∗d for turbulent premixed flames.
Results show under- and over-estimation of plug-load densities over actual densities.
Evidences supporting such presumption were provided by (1) density measurement that found negative deviation of actual densities of TSPU nanocomposite membranes from theoretical prediction; (2) positron annihilation lifetime spectroscopy that demonstrated increased free-volume size and concentration within TSPU upon the in situ generation of TiO2 nanoparticles.
Averaged across the six trials, predictions were very close to actual densities, differing by only 4 kg m−3.
Most studies concern microbes in the water column, although actual densities are much higher in the benthos [1].
