Help


[permalink] [id link]
+
Page "Human swimming" ¶ 5
from Wikipedia
Edit
Promote Demote Fragment Fix

Some Related Sentences

relative and density
In 1955, Paul Erdős showed that the density of amicable numbers, relative to the positive integers, was 0.
Because this range of non-zero amplitude may be very broad or infinite, this definition is typically relaxed so that the bandwidth is defined as the range of frequencies in which the signal's spectral density is above a certain threshold relative to its maximum.
Most commonly, bandwidth refers to the 3-dB bandwidth, that is, the frequency range within which the spectral density ( in W / Hz or V < sup > 2 </ sup >/ Hz ) is above half its maximum value ( or the spectral amplitude, in V or V / Hz, is more than 70. 7 % of its maximum ); that is, above − 3 dB relative to the peak.
In some cases density is expressed as the dimensionless quantities specific gravity or relative density, in which case it is expressed in multiples of the density of some other standard material, usually water or air / gas.
Overall unemployment has been exacerbated by an influx of refugees from the wars in neighboring countries, attracted to Honduras, ironically, by its relatively low population density and relative peace.
Most mafic minerals are dark in color and the relative density is greater than 3.
Quantitative computed tomography differs from DXA in that it gives separate estimates of BMD for trabecular and cortical bone and reports precise volumetric mineral density in mg / cm < sup > 3 </ sup > rather than BMD's relative Z score.
An explanation of this is that although the logarithm of the lognormal density function is quadratic in, yielding a " bowed " shape in a log-log plot, if the quadratic term is small relative to the linear term then the result can appear almost linear.
Swimming relies on the natural buoyancy of the human body, with the relative density of the average body, compared to water, of 0. 98, creating a floating effect.
This map of shipping routes illustrates the relative density of commercial shipping in the world's oceans.
Each spot corresponds to a different type of variation in the electron density ; the crystallographer must determine which variation corresponds to which spot ( indexing ), the relative strengths of the spots in different images ( merging and scaling ) and how the variations should be combined to yield the total electron density ( phasing ).
Specific gravity usually means relative density with respect to water.
The term " relative density " is often preferred in modern scientific usage.
If a substance's relative density is less than one then it is less dense than the reference ; if greater than 1 then it is denser than the reference.
If the relative density is exactly 1 then the densities are equal ; that is, equal volumes of the two substances have the same mass.
If the reference material is water then a substance with a relative density ( or specific gravity ) less than 1 will float in water.
For example, an ice cube, with a relative density of about 0. 91, will float.
A substance with a relative density greater than 1 will sink.
where RD is relative density, ρ < sub > substance </ sub > is the density of the substance being measured, and ρ < sub > reference </ sub > is the density of the reference.

relative and difference
This difference reflects the relative readiness of State courts, compared to Federal courts, to accept an alternative plea.
Arbitrage tends to reduce price discrimination by encouraging people to buy an item where the price is low and resell it where the price is high ( as long as the buyers are not prohibited from reselling and the transaction costs of buying, holding and reselling are small relative to the difference in prices in the different markets ).
Similarly, arbitrage affects the difference in interest rates paid on government bonds issued by the various countries, given the expected depreciations in the currencies relative to each other ( see interest rate parity ).
A 2008 research report found that conservatives are happier than liberals, and that as income inequality increases, this difference in relative happiness increases, because conservatives ( more than liberals ) possess an ideological buffer against the negative hedonic effects of economic inequality.
It is possible to obtain a qualitative understanding of many diffraction phenomena by considering how the relative phases of the individual secondary wave sources vary, and in particular, the conditions in which the phase difference equals half a cycle in which case waves will cancel one another out.
For waves which do not require a medium, such as light or gravity in general relativity, only the relative difference in velocity between the observer and the source needs to be considered.
Finally, the relative frequency of straights versus three of a kind is also sensitive to the deck composition ( and to the number of cards dealt ), so some places may consider three of a kind to be superior to a straight, but the difference is small enough that this complication is not necessary for most games.
Redshift ( and blueshift ) may be characterized by the relative difference between the observed and emitted wavelengths ( or frequency ) of an object.
In most sexual species the males and females have different equilibrium strategies, due to a difference in relative investment in producing offspring.
This difference makes Guugu yimithirr speakers better at performing some kinds of tasks, such as finding and describing locations in open terrain, whereas English speakers perform better in tasks regarding the positioning of objects relative to the speaker ( for example telling someone to set a round table putting forks to the right of the plate and knives to the left would be extremely difficult in Guugu yimithirr ).
For a relationist there can be no real difference between inertial motion, in which the object travels with constant velocity, and non-inertial motion, in which the velocity changes with time, since all spatial measurements are relative to other objects and their motions.
The energy that drives a sailboat is harnessed by manipulating the relative movement of wind and water speed: if there is no difference in movement, such as on a calm day or when the wind and water current are moving in the same direction at the same speed, there is no energy to be extracted and the sailboat will not be able to do anything but drift.
The conceptual difference between uniform and topological structures is that in a uniform space, one can formalize certain notions of relative closeness and closeness of points.
As long as the control grid is negative relative to the cathode, essentially no current flows into it, yet a change of several volts on the control grid is sufficient to make a large difference in the plate current, possibly changing the output by hundreds of volts ( depending on the circuit ).
It is therefore generally easier to separate isotopes with a larger relative mass difference.
Refractive index contrast, in an optical fiber, is a measure of the relative difference in refractive index of the core and cladding.
This is the case because when the angle of scattering changes such that the relative path difference between light scattered from the centre of the illuminated area compared with light scattered from the edge of the illuminated changes by λ, the intensity becomes uncorrelated.
Another way to see this difference is to notice that, relative to the stars, the Sun appears to move around the Earth once per year.
That is, when there is a positive potential difference measured from the emitter of an NPN transistor to its base ( i. e., when the base is high relative to the emitter ) as well as positive potential difference measured from the base to the collector, the transistor becomes active.
The difference in skin color between lightly and darkly pigmented individuals is due not to the number ( quantity ) of melanocytes in their skin, but to the melanocytes ' level of activity ( quantity and relative amounts of eumelanin and pheomelanin ).
All relative methods make use of the contact potential difference between the sample and a reference electrode.
The Doppler effect ( or Doppler shift ), named after Austrian physicist Christian Doppler who proposed it in 1842, is the difference between the observed frequency and the emitted frequency of a wave for an observer moving relative to the source of the waves.
Thus, the relative difference in velocity between a source and an observer is what gives rise to the doppler effect.

0.250 seconds.