How Do We Tell Temperature?
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- เผยแพร่เมื่อ 27 มี.ค. 2017
- This week Reactions takes a look at the science behind how we tell temperature. There's a lot of chemistry that goes into thermometers. We have a lot of confidence that we measure temperature accurately. But how do thermometers in the kitchen or doctor’s office work? Thanks to the laws of thermodynamics, thermometers respond to heat moving from hot to cold as a means of measuring temperature. Clever physical chemists and engineers have taken temperature tools from the simple, but still useful, lined glass thermometers to digital readouts. And you might be surprised to find out how Einstein took thermometers the distance.
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JD Pigs
Producer:
Elaine Seward
Writer:
Darcy Gentleman, Ph.D.
Judith Lavelle
Executive Producer:
Adam Dylewski
Scientific consultants:
Dawn Cross
Darcy Gentleman, Ph.D.
Kyle Nackers
Sources:
Fever Guidelines
www.cdc.gov/quarantine/air/re...
www.mayoclinic.org/first-aid/f...
highschoolenergy.acs.org/conte...
theinventors.org/library/inven...
Galileo Project (Rice Univ.) - Thermometer galileo.rice.edu/sci/instrumen...
EPA - Mercury in your thermometer
www.epa.gov/mercury/mercury-t...
EPA - Mercury - Health Effects
www.epa.gov/mercury/health-ef...
NIST - phasing out mercury thermometer calibration
www.nist.gov/news-events/news...
Galilean Thermometer not so Galilean (interesting, but also corroborates the event of Galileo’s invention of the thermoscope around the start of the 17th century)
pubs.acs.org/doi/abs/10.1021/e...
Bimetallic thermometers
www.teltru.com/topic.aspx?name...
thermocouples [deleted content]
www.msm.cam.ac.uk/utc/thermoco...
thermistors
www.nist.gov/pml/mercury-ther...
www.radio-electronics.com/info...
IR semiconductor sensors
www.noao.edu/meetings/gdw/fil...
IR planet measurement
geosci.uchicago.edu/~rtp1/pap...
www.acs.org/content/acs/en/cl...
“Experiments in Physical Chemistry”, 6th edition. David P. Shoemaker, Carl W. Garland, Joseph W. Nibler. McGraw-Hill, 1996.
Chapter 18 “Temperature” and Chapter 19 “Instruments”
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When I was in 5th grade my teacher asked us what the properties of the element mercury. I said that it expands when it's heat, as I was always told thermometers has mercury in them. She gave me a weird look and said "no it doesnt". I assumed I just misunderstood how a thermometer works. This video confirmed I was correct all those years ago.
Last week in the lab we tried to get water to it"s triple point. It was very cool to see all 3 phases at once
What I wonder about is shade/ light and reflection. Also the energy added to a system. As far as i understand temperature is measured in the shade according to some standard rules and definitions. Within an area the temperature may vary due to surface, plant/ tree growth, many factors. So when the newsperson or weatherstation tells us the temperature, how does that work? And how do satellites do this?
Thank you... Great video... !
You know.... I think you should make fun videos like this on many of the key concepts in Chemistry 1,2 and Organic Chemistry
if people learned them for fun beforehand or outside of class.. they might dread them less, and also, actually earn them, rather than feel anxiety about them and not learn about the concept
Im only a highschool student but it sounds very cool (y)
ya half the thing that makes learning difficult , is the class environment making it very serious, and all the anxiety of attempting to master the concepts taking away your working memory, preventing one from learning..
its very similar to math anxiety
I have a very real case of math anxiety haha
its his wish what he wants to teach at least he is teaching something, if you want chemistry check some other channel
Hello, my teacher made me watch this.
ur name bad
Same lol
Same
same
Same
i'd love a video about triple point, i asked my chem teacher about it but he said that he flunked thermodynamics 3 times in a row in college haha
Great video, I liked it! Thanks!
It would b interesting to know about PVT relation and its graph
I love this
very informative
my virtual teacher made me watch this .-.
same
punch 'em
Same
Thank you for to this video
Thank u sir
I love how most of the people here are from their teachers 😂
(also I’m one of them)
true
Cool
Vitalius Novik hey
Hot
temperature increase causes the fluid to expand can be determined by measuring the volume of the fluid it can be really hot and the person can feel it if it`s really hot
when heat moves from environment to thermometer then temperature of environment decreases and thermometer never gives the actual temperature of environment .How we say thermometer gives true temperature of environment ?
As far as I know (I'm not medical professional), 40c does not necessarily means you need to go to ER. I had it more than once in my life. My little children had it too, but it depends on all other symptoms (or lack of those). Amiright or notatall?
No it definitely does mean you need to go to the ER I'm a former nursing student and if your fever gets past 105° F you can literally die so if it gets to 104° F and you can't get it down you should go to the hospital
are make sound for time4learning
Good
Whenever i get a fever of a 41 celsius degrees i have never gone to a hospital. Ps im Swedish
i got curious
Interesting choice for a Star Trek clip, "Skin of Evil" where Tasha Yar (Denise Crosby) is murdered.
Heat can be created and destroyed, though. It just has to be converted to or from some other form of energy. Is this correct?
True indeed. The thermal dynamics rules actually say 'Energy cannot be created nor destroyed' in the video they said heat to simplify things. All in all, energy can intact be created through nuclear processes such as nuclear fission, as the famous equation E=MC² tells us, energy can be made to mass and mass to energy.
Omer Magen E=mc2 actually means that mass and energy is the same thing. The energy is always conserved. "Heat" isnt energy, the thermal energy of the molecules is energy, but heat only exist as a potential between 2 states.
POV: ur in my science lesson and are scrolling through the comments
Lol I go to your school too u know who I an
Venusfliegenfalle who r u?
Is it just me or did your teacher tell you to watch this
For me I got curious how the mercury thermometer thingy works and actually searched it up HAHA
I am 14 and i don't know this
Calderglen high school ????
What's the temperature for ovulation
Lockdown made me to look this
This guy sounds exactly like veritasium wth
my teacher also made me watch this
Hello my teacher made me watch this
💀
I use Siri to get temperature
Im here because of school
F***
do your work young man
Who’s here from Jollibee
4:35 Half of the world under Russian control. Illuminati confirmed.
poooooooooooooooooooop
lol
Isn't this Physics?
Isn't Physics just Math?
Reactions I'm just extremely surprised (plesantly I might add) that you guys did a physics video ( you cant deny it isnt since it has all the laws of thermodynamics)
The beautiful thing about chemistry is that since atoms and molecules make up everything we get to have a hand in everything.
@@ACSReactions OHHHHHHHHHHHHH
not my god dam TEACHER sending me this
do your work kiddo
Good