List of unsolved problems in physics - Revision history

94.255.207.166: /* Unsolved problems by subfield */ geocentrism shouldn't be listed as a possible alternative to Inflation, right?

2014-12-30T13:52:57Z

Unsolved problems by subfield: geocentrism shouldn't be listed as a possible alternative to Inflation, right?

← Older revision		Revision as of 15:52, 30 December 2014
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	~~Nothing~~ to ~~tell about me~~ really.<br>~~Finally~~ a ~~part~~ of ~~wmflabs~~.~~org~~.<br>I ~~really wish~~ I~~'m useful in one way here~~.<br><br>~~Feel free~~ to ~~surf~~ to ~~my homepage [http://hemorrhoidtreatmentfix~~.~~com/internal-hemorrhoids internal hemorrhoids]~~		Do you understand where we stand when it comes to a weight? Are you obese, overweight, or even underweight? I've seen a lot of questions regarding this particular topic and hopefully this can aid clarify things.<br><br>This really is where the [http://safedietplans.com/bmi-chart bmi chart] is misleading. Recent studies have even shown a weak and inconsistent correlation between a excellent BMI and condition or early mortality.<br><br>A greater test is to bmi chart men stand parallel to a mirror, turn your head toward the mirror and see in the event you have a 'beer belly.' Or after we have showered and dried off, stand inside front of the bathroom mirror, and jump up and down.<br><br>Naturally, its not always black plus white. We learn that females tend to have a high percentage of body fat than men, whether or not they are the same fat plus height, and therefore have the same BMI. (Sorry, ladies.) Also, the elder we get, you tend to have more body fat than younger adults. And again, athletes and rather muscular persons like bodybuilders will likely not have an accurate BMI according to this method.<br><br>Obesity is regarded as the most hyped issues of today due to the growing amount of individuals with the condition and considering it will result various life-threatening conditions. An obese individual is more prone to diabetes, heart diseases, stroke, plus joint difficulties. Thus, preserving a healthy body weight is imperative.<br><br>21. Running Clothes/Bra: I like my running dresses sporty--not funky, yet this might be clearly bmi chart women personal preference. A advantageous running bra will go a extended way...avoid cotton at all cost. I have learned which running skirts are the most polarizing of all apparel goods. However, when you love wearing a skirt, pay a visit to the Skirtchaser Race Series...looks like fun!<br><br>Hydrostatic Weighing - This sort of weighing is also called as underwater weighing. In purchase to work this, a seat is placed on top of a scale inside an underwater environment. The scale is then zeroed out and once done, the individual is asked to sit found on the chair. The individual could full exhale and there is a have to bend down until the head is furthermore underwater. When the scale stabilizes, the reading is taken plus then employed to determine the body fat percentage.<br><br>You are able to choose some of the weight charts on this page. It won't take much time. Read about the body mass chart plus how you are able to employ it as a instrument for weight loss.

173.2.247.40: /* High energy physics/particle physics */ fixed link

2014-02-13T16:22:20Z

High energy physics/particle physics: fixed link

← Older revision		Revision as of 18:22, 13 February 2014
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	~~{{Unreferenced\|date=December 2009}}~~		Nothing to tell about me really.<br>Finally a part of wmflabs.org.<br>I really wish I'm useful in one way here.<br><br>Feel free to surf to my homepage [http://hemorrhoidtreatmentfix.com/internal-hemorrhoids internal hemorrhoids]
	~~'''Thermal history modelling''' is an exercise undertaken during [[basin modelling]]~~ to ~~evaluate the temperature history of stratigraphic layers in~~ a ~~[[sedimentary basin]].~~

	~~The thermal history~~ of ~~a basin is usually calibrated using thermal indicator data, including [[vitrinite]] reflectance and [[fission track]]s in the [[mineral]]s [[apatite]] and [[zircon]]~~.

	The temperatures undergone by rocks in a sedimentary basin are crucial when attempting to evaluate the quantity, nature and volume of [[hydrocarbon]]s ([[fossil fuel]]s) produced by [[diagenesis]] of [[kerogen]]s (a group of chemicals formed from the decay of organic matter).

	~~[[Jean Baptiste Joseph Fourier\|Fourier~~'~~s]] [[Fourier's Law\|Law]] provides a simplified~~ one~~-dimensional description of the variation in heat flow ''Q'' as a function of [[thermal conductivity]] ''k'' and thermal gradient ''dT''/''dz'':~~

	:<~~math~~>~~Q=-k\frac{dT}{dz}~~<~~/math~~>

	~~(The minus sign indicates that heat flows in the opposite direction~~ to ~~increasing depth, that is, towards the Earth's surface.)~~

	~~If the assumptions used~~ to ~~justify this simplified approximation (i.e. steady-state [[heat conduction]], no [[convection]] or~~ [~~[advection]]) are accepted, we define the simple 1-dimensional heat diffusion equation where temperature ''T'' at a depth ''z'' and time ''t'' is given by the equation~~:

	~~:<math>T_{z,t} = T_{t}^0 + Q_t \int_0^z\frac{dz'}{k_{z'}}</math>~~
	~~where ''T''<sub>t</sub><sup>0<~~/~~sup> is the surface temperature history, ''Q''<sub>''t''<~~/~~sub> is the [[heat flow]] history and ''k'' is thermal conductivity~~. ~~The integral thus represents the integrated thermal conductivity history of a 1-dimensional column of rock.~~

	~~Thermal history modelling attempts to describe the temperature history ''T''<sub>z,t<~~/~~sub> and therefore requires a knowledge of the burial history of the stratigraphic layers which is obtained through the process of [[back~~-~~stripping]].~~

	~~==See also==~~
	*[[Petroleum geology]]

	~~{{DEFAULTSORT:Thermal History Modelling}}~~
	~~[[Category:Petroleum geology]]~~
	~~[[Category:Sedimentology]~~]

155.185.21.72: /* Quantum mechanics */

2014-01-29T16:08:55Z

Quantum mechanics

← Older revision		Revision as of 18:08, 29 January 2014
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	~~If you should speed up the PC then you have come~~ to the ~~appropriate region~~. ~~I will show we~~, at the ~~moment, five quick techniques to dramatically enhance a computer'~~s ~~performance~~.~~<br><br>Install an anti-virus software. If you already have that on you computer then carry out~~ a ~~full program scan. If it finds any viruses on~~ the ~~computer~~, ~~delete those. Viruses invade the computer~~ and ~~create it slower. To protect the computer~~ from ~~numerous viruses, it is very better to keep~~ the ~~anti~~-~~virus software running whenever we use~~ the ~~internet. We might also fix the safety settings~~ of ~~the web browser. It usually block unknown~~ and ~~risky websites and block off any spyware or malware striving to get into a computer.~~<br><br>~~Whenever you compare registry products we need a swiftly acting registry cleaning. It~~'s ~~no good spending hours plus~~ the ~~PC waiting for a registry cleaning~~ to ~~complete its task~~. ~~We want a cleaner to complete its task inside minutes~~.~~<br><br>Always see to it which we have installed antivirus, anti~~-~~spyware and anti-adware programs and have them up-to-date on a regular basis. This can help stop windows XP running slow.<br><br>There are actually several~~ [~~http://bestregistrycleanerfix.com/tune-up-utilities tuneup utilities~~] ~~software pieces in the internet and truly the only thing that you should do is to download them. Unfortunately~~, ~~we cannot expect which all of these~~ are ~~because effective as they claim to be. And due to this~~, ~~it happens to be necessary for~~ we ~~to check when~~ the ~~vendor~~ is ~~actually reliable plus credible.~~<br><br>~~Why this issue happens frequently? What are~~ the ~~causes of it? In truth~~, ~~there are 3 major causes that can cause the PC freezing issue. To resolve the problem, you have to take 3 steps in the following paragraphs.~~<br><br>~~The initially reason a computer might be slow~~ is ~~considering it demands more RAM~~. ~~You'll see this issue right away, particularly in~~ the ~~event you have less than~~ a ~~gig~~ of ~~RAM. Most modern computers come with a least which much~~. ~~While Microsoft says Windows XP could run on 128 MB, it plus Vista want at least a gig to run smoothly and let we~~ to ~~run multiple programs at when. Fortunately,~~ the ~~price of RAM has dropped significantly, plus you are able to get a gig installed for $100 or less.~~<br><br>~~Before you buy~~ a ~~complete fresh system; it happens to be time to get~~ the ~~old 1 cleaned up thus you can begin getting more done online today! Visit our site below and access~~ the ~~many reputable registry cleaner software accessible~~.		{{Unreferenced\|date=December 2009}}
			'''Thermal history modelling''' is an exercise undertaken during [[basin modelling]] to evaluate the temperature history of stratigraphic layers in a [[sedimentary basin]].

			The thermal history of a basin is usually calibrated using thermal indicator data, including [[vitrinite]] reflectance and [[fission track]]s in the [[mineral]]s [[apatite]] and [[zircon]].

			The temperatures undergone by rocks in a sedimentary basin are crucial when attempting to evaluate the quantity, nature and volume of [[hydrocarbon]]s ([[fossil fuel]]s) produced by [[diagenesis]] of [[kerogen]]s (a group of chemicals formed from the decay of organic matter).

			[[Jean Baptiste Joseph Fourier\|Fourier's]] [[Fourier's Law\|Law]] provides a simplified one-dimensional description of the variation in heat flow ''Q'' as a function of [[thermal conductivity]] ''k'' and thermal gradient ''dT''/''dz'':

			:<math>Q=-k\frac{dT}{dz}</math>

			(The minus sign indicates that heat flows in the opposite direction to increasing depth, that is, towards the Earth's surface.)

			If the assumptions used to justify this simplified approximation (i.e. steady-state [[heat conduction]], no [[convection]] or [[advection]]) are accepted, we define the simple 1-dimensional heat diffusion equation where temperature ''T'' at a depth ''z'' and time ''t'' is given by the equation:

			:<math>T_{z,t} = T_{t}^0 + Q_t \int_0^z\frac{dz'}{k_{z'}}</math>
			where ''T''<sub>t</sub><sup>0</sup> is the surface temperature history, ''Q''<sub>''t''</sub> is the [[heat flow]] history and ''k'' is thermal conductivity. The integral thus represents the integrated thermal conductivity history of a 1-dimensional column of rock.

			Thermal history modelling attempts to describe the temperature history ''T''<sub>z,t</sub> and therefore requires a knowledge of the burial history of the stratigraphic layers which is obtained through the process of [[back-stripping]].

			==See also==
			*[[Petroleum geology]]

			{{DEFAULTSORT:Thermal History Modelling}}
			[[Category:Petroleum geology]]
			[[Category:Sedimentology]]

213.246.88.102: /* Astronomy and astrophysics */ uppercase (proper noun)

2012-09-01T13:27:15Z

Astronomy and astrophysics: uppercase (proper noun)

New page

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