| Temperatures
of Note: Can
you estimate how hot something is just by touching it? Obviously one would not
touch anything that is so hot that it glows or is incandescent. Almost as obvious,
one would not really be safe touching something that is hot but not incandescent
if it were, say, at about 250 °C or 480°F. In such a case the resulting
burn could be very serious. However, usually one feels the heat from a sub-incadescent
object well before the urge to touch becomes too great. The human sense of heat
sensation can help us estimate about how hot an object that is slightly warm or
cold. If
an object is near human body temperature, it will feel warm or cold according
to how large the difference is between the surface temperature of one's skin and
the object. Objects at about 54 to 55°C (130°F) will usually result in
a sensation of warmth that is on the threshold of pain: it's really hot!. So,
please be careful touching things just to gauge their temperature unless you have
a very good reason to believe they are near to your body temperature of about
36°C or 98°F. Temperatures
of Note: Threshold
of Pain Temperature: About 54 °C or 130°F. The
World
Record for the Lowest Temperature measured on Earth is 1/2 a billionth of
a kelvin above Absolute Zero, or 0.0000000000005 K, reported by a team from MIT
in ScienceWorld on Sept 12, 2003. Temperature
and Absolute Zero A really clever and easy to understand presentation (it's
brief and animated, too) on the subject including a mention of the previous World
Recod for the World's Lowest Temperature of a few billionths K.
Food
safety & food temperatures Food
safety
A Federal Government/Private Sector Partnership Web Site-(has
more than a passing relationship to temperature measurement and temperature sensors) Shopper's
Guide to Plastics & Food: Microwave Ovens
"Plastic
plus hot plus fat is the worst combination. That's because most chemicals that
leach from plastic are lipophilic (they love fat) and high temperature speeds
up the leaching process into the fat." According to a toxicologist on a website
that asks the question: Is it safe to microwave food in plastics? Elemental
(not elementary) temperatures
Melting (Freezing) temperatures of the elements
Courtesy
of Horizon Technology -- MELTING AND BOILING POINTS OF THE ELEMENTS Web site page. Boiling
(Vaporization) temperatures of the elements
Courtesy
of Horizon Technology -- MELTING AND BOILING POINTS OF THE ELEMENTS Web site page.
Physical properties of the Elements in the Periodic Table vs temperature in six
different languages
A
downloadable program from The Web site at The Department of Analytical Chemistry,
Faculty Of Chemical Technology, Split, Teslina, Croatia. Temperatures
around the world. The
Globe Program-A unique science education site that features interesting aspects
of global temperatures, teaching aids and much more. from the USA agency NOAA. World
Temperature Extremes
The highest and lowest temperatures recorded at
various places around the world from Africa and Antartica to Western Australia
and every individual state in the USA. (Just for interest this site's webmaster
was present near Tower Minnesota on January 12, 1996 when the record for the lowest
temperature in the Continental USA was set there and even has the custom Baseball
cap to prove it!) Earth's
greenhouse "effect", Global Warming and key temperatures. What is the
true scoop? Some say it is real, others say balderdash! Still
Waiting For Greenhouse
A
lukewarm view of Global Warming from John Daley in Tasmania! The
USA's Environmental Protection Agency Global Warming Site
The Official US Government site on the subject of Global Warming. The
Rest of The Story
From Carnegie-Mellon University a perspective on the issue of global warming and
what's really important. Water/Marine
and Earth Surface Temperatures World
Climate
What the weather is normally for thousands of towns and cities
worldwide! Near
Real Time Sea Surface Temperature
Discussion of the Earth's hydrosphere,
as displayed by the Smithsonian Earth Today exhibit. Sea
Surface Temperature Satellite Image Archive
This page provides access
to the University of Rhode Island, Graduate School of Oceanography's archive of
sea surface temperature satellite images. These images are processed Advanced
Very High Resolution Radiometer (AVHRR) data from NOAA satellites. The images
depict sea surface temperature. DOE's
Multispectral Thermal Imager (MTI) Satellite Home Page
MTI's spectral
bands are carefully selected to collect data needed to derive a broad range of
information on facilities and activities, including surface temperatures, materials,
water quality, and vegetation health. To enhance accuracy, additional bands provide
simultaneous information on atmospheric water vapor, aerosol content, and sub-visual
cloud presence. A recent presentation
discussed how Earth surface temperatures can be measured from space with
an calibration accuracy of a few degrees. NOAA's
Optimum Interpolation Sea Surface Temperature Analysis
The optimum interpolation
(OI) sea surface temperature (SST) analysis is produced weekly on a one-degree
grid. The analysis uses in situ and satellite SST plus SST's simulated by sea-ice
cover. NASA's
Visible Earth-Oceans
Sea Surface Temperatures, Water temperature and much
more from NASA'a many observing platforms. Modern
Average Global Sea-Surface Temperature
U.S. Geological Survey Digital
Data Series DDS-10. The purpose of this data set is to provide paleoclimate researchers
with a tool for estimating the average seasonal variation in sea-surface temperature
(SST) throughout the modern world ocean and for estimating the modern monthly
and weekly sea-surface temperature at any given oceanic location. The data contained
in this data set are derived from the NOAA Advanced Very High Resolution Radiometer
Multichannel Sea Surface Temperature data (AVHRR MCSST), which are obtainable
from the Distributed Active Archive Center at the Jet Propulsion Laboratory (JPL)
in Pasadena, Calif. The JPL tapes contain weekly images of SST from October 1981
through December 1990 in nine regions of the world ocean: North Atlantic, Eastern
North Atlantic, South Atlantic, Agulhas, Indian, Southeast Pacific, Southwest
Pacific, Northeast Pacific, and Northwest Pacific.
Canadian Weather Office - Atlantic Marine Conditions
More than water temperatures
with links to other Canadian marine conditions:- Pacific Coast, - North of 60º,
- Prairie Lakes, - James Bay, - Ontario Lakes and St. Lawrence Temperatures
and depths and more about the Great Lakes in the USA. TemperatureWorld
A different look at temperature from a friendly website on temperature by Alan
Parker. Service
Temperatures for various plastics and other materials. Sortable
Materials Properties Table
From
Boedeker Plastics, Inc., covering plastics materials from ABS to Vespel SP-21
(graphite), including Specific Gravity ,Tensile Strength, Tensile Elongation at
Break , Flexural Strength, Coefficient of Linear Thermal Expansion, Heat Deflection
Temperature, Max Recommended Use Temperature, Thermal Conductivity, UL94 Flammability
Rating , UL rating and Dielectric Strength
Max. permitted temperature
limit for Plastics in incandescent lighting fixtures according to IEC 598–1
(°C)
From
Vossloh-Schwabe, a large manufacturer of electrical and electronic components
for the lighting industry.
Max.
permitted temperature limit for Thermoplastics used in fluorescent lighting according
to IEC 598–1 (°C)
From
Vossloh-Schwabe, a large manufacturer of electrical and electronic components
for the lighting industry. Maximum
use temperature of thermocouples. Electrical
resistivity of platinum, nickel and copper as a function of temperature. Electrical
coefficients of resistance of some ceramics at high temperatures. Electrical
coefficients of resistance as a function of temperature for some metals and alloys. Mechanical
properties of materials as a function of temperature. Ignition
temperatures of various materials. Etcetera etc.
etc. (to be continued) Good
luck and best wishes. If you have some interesting success,
let us know and we'll help you share that with others who visit these pages.
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