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Topic: Orders of magnitude (specific heat capacity)


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In the News (Tue 8 Dec 09)

  
  Helium. Who is Helium? What is Helium? Where is Helium? Definition of Helium. Meaning of Helium.
The specific heat capacity of helium gas is very high and helium vapor is very dense, expanding rapidly when it is warmed to room temperature.
Specifically, it is found in minerals of uranium and thorium, such as clevites, pitchblende, carnotite, monazite and beryl; it is produced from these elements by radioactive decay in the form of alpha particles.
Since the transformation is one of higher order, without latent heat at the lambda point, the two liquid forms never coexist.
www.knowledgerush.com /kr/encyclopedia/Helium   (1474 words)

  
 Silicon [Definition]   (Site not responding. Last check: 2007-10-15)
Heat of vaporizationThe heat of vaporization is a physical property of substances.
Heat of fusionHeat of fusion is the heat energy which must be withdrawn to solidify a liquid or added to melt a solid.
The SI unit for specific heat capacity is the joule per kilogram kelvin, the amount of heat energy (measured in joules) required to raise the temperature of one kilogram of the substance by one kelvin.
www.wikimirror.com /Silicon   (12575 words)

  
 Articles - Orders of magnitude   (Site not responding. Last check: 2007-10-15)
Thus, an order of magnitude is an approximate position on a logarithmic scale.
An order of magnitude estimate of a variable whose precise value is unknown is an estimate rounded to the nearest power of ten.
For example, an order of magnitude estimate for a variable between about 3 billion and 30 billion (such as the human population of the Earth) is 10 billion.
www.oldion.com /articles/Orders_of_magnitude   (617 words)

  
 Regions Hospital: Burns and Wound Management   (Site not responding. Last check: 2007-10-15)
Heat is transferred by electromagnetic energy such as microwaves and infrared light, and by contact with the molecules of hot gases (flame injuries), hot liquids (scalds) or hot solid objects (contact or branding injuries).
Specific heat is the amount of energy required to raise the temperature of a gram of material by one degree of temperature.
The skin temperature achieved by a given heat exposure is determined by the rate of heat addition, the duration of exposure, the heat capacity (specific heat) of the tissue, the blood flow through the tissue, the rate of heat transfer to deeper tissues and the rate of heat loss back out through the skin.
www.regionshospital.com /Regions/Menu/0,1592,5169,00.html   (4726 words)

  
 Gold [Definition]   (Site not responding. Last check: 2007-10-15)
Heat flows between regions that are not in thermal equilibrium; in particular, it flows from areas of high temperature to areas of low temperature.
Heat, moisture, oxygen This article is about the element Oxygen, there is also an article for the TV channel/Cable Network for women, Oxygen Network.
It is equal to the mass of the object multiplied by the magnitude of the gravitational field.
www.wikimirror.com /Gold   (14609 words)

  
 Spirax Sarco Learning Centre: 2.2 - Steam Engineering Principles and Heat Transfer: What is Steam?
Heat that breaks the lattice bonds to produce the phase change while not increasing the temperature of the ice, is referred to as enthalpy of melting or heat of fusion.
This may be considered as the useful portion of heat in the steam for heating purposes, as it is that portion of the total heat in the steam that is extracted when the steam condenses back to water.
This is because the specific enthalpy of evaporation decreases as the steam pressure increases.
www.spiraxsarco.com /learn/html/2_2_01.htm   (3257 words)

  
 Henry Wallace: Kinemassic Force Field
The relative magnitude of the undulating kinemassic force field and the kinemassic permeability characterizing the associated structure are both influential in determining the effective shielding of the kinemassic field permeable structure.
These temperature corrections account for the heat applied to the system, as well as that due to the change in specific heat property of the apparatus due to frictional heating, as well as that due to the change in specific heat property of the apparatus, principally the brass members die to their relative bulk.
In order to substantiate the distance dependency of the gravitational coupling force due to the dynamic interaction of relatively moving bodies it was predicted that increasing the separation between the generator rim flange 21a and the cooperating surface of the pole pieces 23a should measurably reduce the results obtained.
www.rexresearch.com /wallace/wallace.htm   (16289 words)

  
 Problem # 8
While the wood is burning on its surface, the inside of the wood may remain frozen until the heat from the surface penetrates to the core.
heat the ice from –20 deg F to 32 deg F, which is a temperature difference of 52 degrees F. We can account for the amount of heat required to raise the temperature of the ice from the ambient temperature to the melting point.
Let’s assume the firebox is 10 cubic feet (that is a large firebox) and the average temperature in the firebox is 570 deg F. Let’s assume that the vent is supplying 10 cubic feet of air at 70 deg F per minute to the fire.
www.green-trust.org /2003/howmuchwood.htm   (3512 words)

  
 Frozen Ground Glossary: English Language Glossary
Specific processes of cryogenesis include water migration during freezing and thawing of the ground, frost heave, heat and mass (moisture) exchange, regelation and gelifluction.
This term is a commonly used abbreviation of specific heat capacity, which does not include the effects of changes in latent heat due to the melting of ice or the freezing of water with changes in temperature.
During the winter, heat from the soil surrounding the embedded portion of the pipe is absorbed by and thus warms the working fluid, which rises to the above-ground radiator section of the pipe exposed to the cooler air and loses its heat by conduction and natural convection.
nsidc.org /fgdc/glossary/english.html   (15732 words)

  
 Orders of magnitude (power) - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-15)
They are grouped by orders of magnitude, and each section covers three orders of magnitude, or a factor of one thousand.
1 kW to 2 kW - Tech: heat output of a domestic electric kettle.
4 PW - Geo: estimated total heat flux transported by Earth's atmosphere and oceans away from the equator towards the poles.
www.hackettstown.us /project/wikipedia/index.php/Orders_of_magnitude_(power)   (779 words)

  
 Energy Glossary Letters S
SE (Seasonal Efficiency) - a measure of the percentage of heat from the combustion of gas and from associated electrical equipment which is transferred to the space being heated during a year under specified conditions.
SHADING - 1) The protection from heat gains due to direct solar radiation; 2) Shading is provided by (a) permanently attached exterior devices, glazing materials, adherent materials applied to the glazing, or an adjacent building for nonresidential buildings, hotels, motels and highrise apartments, and by (b) devices affixed to the structure for residential buildings.
SPECIFIC HEAT - In English units, the quantity of heat, in Btu, needed to raise the temperature of one pound of material one degree Fahrenheit.
www.energy.ca.gov /glossary/glossary-s.html   (2163 words)

  
 The Thermophysical Properties of Bulk Metallic Glass-Forming Liquids
Specific heat capacities in the supercooled liquid for several alloys normalized to the eutectic temperature, T
The data cover 15 orders of magnitude, with the exception of the temperature range where the crystallization nose in the TTT diagram (Figure 1) is observed.
At low temperatures, the atoms predominantly move by atomic hopping because the motion due to cooperative shearing is several orders of magnitude slower, as indicated by the structural relaxation time (Figure 6).
www.tms.org /pubs/journals/JOM/0007/Busch-0007.html   (3243 words)

  
 DISCUSSION
As a result, the conductive heat flow measured at a shallow sub-bottom depth can be significantly less than the actual geothermal heat flow entering from the bottom of the formation.
The chemical diffusion coefficient of pore water is several orders of magnitude less than the thermal diffusivity.
The diffusivities are estimated from the thermal conductivities assuming a volumetric specific heat capacity of 3.2 × 10
www-odp.tamu.edu /publications/166_SR/chap_10/c10_6.htm   (3482 words)

  
 Nat' Academies Press, Potential Applications of Concentrated Solar Energy: Proceedings of a Workshop (1991)
The laser energy manifests itself in the form of heat, and the thermal effects of nanosecond laser irradiation can be determined by the solution of one-dimensional heat flow equation with appropriate boundary conditions, while taking into account the phase changes occurring in the material.
A three-dimensional solution is not required because of the very short processing times (~200 ns) and the large transverse dimensions of the laser beam, which result in thermal gradients many orders of magnitude greater in the perpendicular direction to the surface than compared to the transverse directions [3,4].
To solve Equation (1), we have adopted a higher order implicit finite difference method in which the thermal gradients at the interface are accurately determined for calculating the interfacial velocity[4].
www.nap.edu /books/0309045770/html/71.html   (847 words)

  
 [No title]
A drainage _________ is an area that contributes water to a specific stream, and is separated from the drainage area of another stream by a drainage_________.
In general, as the order of a stream increases, the average gradient of the stream ___________ (increases/decreases).
A ____________ is a surface crack that is connected with an underground heat source, but the limited supply of water only produces the venting of __________ at the surface.
www.daltonstate.edu /faculty/tdeaton/pgreview2.htm   (5940 words)

  
 The Relative Magnitude of the Impacts and Effects of GHG-Related Emission Reductions - Meteorological Service of Canada ...
In this chapter a review of the literature is presented in order to produce a preliminary assessment of the relative magnitude of the effects from reductions in GHG-related emissions.
For the U.S., it is estimated that at least 33,000 deaths a year could be avoided by 2020, which is the same order of magnitude that currently occurs from human immuno-deficiency and chronic liver diseases.
As demonstrated in the discussion on effects directly related to emission reductions, environmental risk to externalities may also be influenced by the duration of exposure (short, medium or long term), and the spatial extent of the effects (local, regional or global).
www.msc-smc.ec.gc.ca /saib/atmosphere/reduced_emission/5_e.html   (6511 words)

  
 Bad Astronomy Bulletin Board :: View topic - Sun core "pinhead" illustration in error?   (Site not responding. Last check: 2007-10-15)
I have no idea what is the heat capacity of fully ionized hydrogen is, but I would not want to be on the same city block with that pinhead.
The specific density of hydrogen at sun's core is 150.
The specific heat of hydrogen is 14304 Joules per kg per degree K. Core temp is 15 million C. So 1 mm^3 hydrogen at that pressure is 0.15 grams, and specific heat is 14.304 Joules per g per degree K. 14.304 J/g/K * 15e6 K * 0.15 g = 32 megajoules.
www.badastronomy.com /phpBB/viewtopic.php?p=396513&highlight=   (2703 words)

  
 India Encyclopedia   (Site not responding. Last check: 2007-10-15)
, order of magnitude of largest known prime number, as of February 2005.
10^{\,\!10^{10^{34}}}, order of magnitude of an upper bound that occurred in a proof of Skewes
Graham's number, probably the largest number seriously used in a mathematical proof, can be written as f^{64}(4); representation in powers of 10 would be impractical, for the definition of the number see the main article about it
www.indiaencyclopedia.com /index.php?title=1_E12   (1868 words)

  
 Cytotoxic and Genotoxic Consequences of Heat Stress Are Dependent on the Presence of Oxygen in Saccharomyces cerevisiae ...
Furthermore, general inhibition of gene expression during heating does not block the acquisition of thermotolerance (5).
Specific oxidative DNA lesions and enzymatic DNA repair pathways have evolved to cope with the flux of oxidants which are
Heat shock factor-independent heat control of transcription of the CTT1 gene encoding the cytosolic catalase T of Saccharomyces cerevisiae.
jb.asm.org /cgi/content/full/183/15/4580   (5910 words)

  
 MUPUS Proposal: Thermal Conductivity Probe (PEN-THC)   (Site not responding. Last check: 2007-10-15)
There is one exception: the temperature in the vicinity of a line heat source is a direct function of thermal conductivity and is independent of r and c.
When plotted vs. the logarithm of time, the temperature increase is linear after the first few minutes, where the heat capacity of the sensor and geometric errors are significant.
After a few minutes, the result is independent of the heat capacity of the sensor and yields the thermal conductivity of the surrounding material.
ifp.uni-muenster.de /~seiferl/mp4112.html   (1198 words)

  
 Alternative Energy Action Network
The rate of introduction of hydrogen-fueled vehicles is currently nearly two orders of magnitude lower than was generally expected 4 to 8 years ago [1], and it seems likely to remain at such a depressed rate for at least several more decades [2].
The data are undeniable that the gap between global oil production capacity and global demand has dropped from over 8% to under 1.5% in the past three years, while China continues to deal with chronic oil and gas shortages.
Even the largest case considered here is smaller (by an order of magnitude) than that in the NAS/NAE report, where they assumed NG would cost $4.5/GJ [3] compared to my projection of $20/GJ in the year 2040.
www.altenergyaction.org /mambo/index.php?option=content&task=view&id=13&Itemid=2   (6295 words)

  
 MSEL - Metallurgy Division Annual Report
The properties of interest are: enthalpy, specific heat capacity, thermal expansion, electrical resistivity, hemispherical total emissivity, normal spectral emissivity, melting temperature, heat of fusion, and thermal diffusivity.
The laser polarimeter used for the measurement of normal spectral emissivity of the specimen during pulse heating was developed in collaboration with Containerless Research, Inc. The new accurate subsecond technique for the measurement of hemispherical total emissivity was developed in collaboration with a scientist from the National Research Laboratory of Metrology (Japan).
McClure, J. L., "Application of Laser Polarimetry to the Measurement of Specific Heat Capacity of Molybdenum in the Range 2000 to 2800 K by a Pulse-Heating Technique," 13th Symposium on Thermophysical Properties, Boulder, Colorado, June, 1997.
www.metallurgy.nist.gov /techactv1997/MetalDataChar.html   (12983 words)

  
 Sam's Laser FAQ - Solid State Lasers
Note that while the peak power of the output pulses for a Q-switched laser may be many orders of magnitude greater than with the Q-switch disabled or bypassed, for the fundamental output wavelength (e.g., 1,064 nm for a Nd:YAG laser), the total energy (pulsed) or average power (quasi-CW) is generally lower.
The numbers I have seen are on the order of about 30 mW out for 1 W of diode pumping (efficiency is much higher with Ti:Saph pumping, but it's kind of inconvenient to have a such a laser pump a 100 mW 532 nm system, not to mention expensive.
Specifications for a variety of arc lamps used to be available on the EG&G, now Perkin-Elmer, Web site but for now at least, much of it is gone.
an.hitchcock.org /repairfaq/sam/laserssl.htm   (19266 words)

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