mersenneforum.org  

Go Back   mersenneforum.org > Fun Stuff > Lounge

Reply
 
Thread Tools
Old 2021-01-17, 18:12   #78
The Carnivore
 
The Carnivore's Avatar
 
Jun 2010

2×53 Posts
Default

Quote:
Originally Posted by a1call View Post
https://www.telegraph.co.uk/science/...l-alive-earth/

Temperature – tardigrades can survive:
A few minutes at 151 °C (304 °F)[51]
30 years at −20 °C (−4 °F)[52]
A few days at −200 °C (−328 °F; 73 K)[51]
A few minutes at −272 °C (−458 °F; 1 K)[53]

https://en.m.wikipedia.org/wiki/Tardigrade
I find it more surprising that people can also survive whole-body exposures to temps exceeding 151 C for a few minutes, without suffering significant injuries:
https://www.nytimes.com/2010/08/27/w...kiln.html?_r=0

Quote:
Later that day, Mr. Seo’s ovens are packed with something new: people, who huddle inside where the temperature still hovers around 200 degrees Celsius (nearly 400 Fahrenheit), so hot that synthetic clothes are banned because they can melt.
The Carnivore is offline   Reply With Quote
Old 2021-01-17, 19:04   #79
xilman
Bamboozled!
 
xilman's Avatar
 
"𒉺𒌌𒇷𒆷𒀭"
May 2003
Down not across

1059210 Posts
Default

Quote:
Originally Posted by The Carnivore View Post
I find it more surprising that people can also survive whole-body exposures to temps exceeding 151 C for a few minutes, without suffering significant injuries:
https://www.nytimes.com/2010/08/27/w...kiln.html?_r=0
Only mildly surprising to me.

I've spent 20 minutes at 105C and a few minutes at 120C without significant discomfort.

Some USAF experiments back in the 70s showed that people can survive 120C for an hour or more as long as they are naked, sitting on low thermal conductivity materials such as cork, and have enough cool water to drink.

Hairless mammals have seriously effective cooling mechanisms.

I wouldn't want to try 150C though.
xilman is online now   Reply With Quote
Old 2021-01-17, 19:11   #80
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

222348 Posts
Default

The US military has done tests and exposed people to over 200C while at the same time cooking a steak in the same area.

And here is an infographic:
https://cdn.mos.cms.futurecdn.net/Gu...zWf-970-80.jpg
Uncwilly is online now   Reply With Quote
Old 2021-01-17, 21:00   #81
Dr Sardonicus
 
Dr Sardonicus's Avatar
 
Feb 2017
Nowhere

10F516 Posts
Default

I remember seeing a TV program - perhaps about people setting records - which had a segment about a man who endured a very high temperature for a number of minutes. He sat in a small room or enclosure which was heated by a large number of incandescent lamps, sweating profusely. He spoke about his experience, saying it had occurred to him that a batch of cookies could have been baking next to him while he was in there. That would indicate he endured a temperature of around 400 F (204 C) for about 10 minutes.

I had previously read that people could endure "enough heat to cook a steak."

I have experienced 100 C or perhaps a bit more for 20 minutes on a number of occasions, in a sauna. It wasn't unpleasant, except for when I was on a bench near the ceiling, and somebody dumped some water in the basin of rocks on top of the stove. That steam was scalding!
Dr Sardonicus is offline   Reply With Quote
Old 2021-01-17, 21:05   #82
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

937210 Posts
Default

Quote:
Originally Posted by Dr Sardonicus View Post
I have experienced 100 C or perhaps a bit more for 20 minutes on a number of occasions, in a sauna.
I have retrieved items out of a 550 C furnace before barehanded. Yes, actually picking up items that were at 550. They were low thermal mass, highly conductive, and the contact area was small.

I will dig out the details of the tests I mentioned above later.
Uncwilly is online now   Reply With Quote
Old 2021-01-17, 21:17   #83
a1call
 
a1call's Avatar
 
"Rashid Naimi"
Oct 2015
Remote to Here/There

26×31 Posts
Default

DO NOT TRY THIS AT HOME!


https://youtu.be/yTOCAd2QhGg
a1call is offline   Reply With Quote
Old 2021-01-18, 07:37   #84
xilman
Bamboozled!
 
xilman's Avatar
 
"𒉺𒌌𒇷𒆷𒀭"
May 2003
Down not across

25·331 Posts
Default

Quote:
Originally Posted by Dr Sardonicus View Post
I have experienced 100 C or perhaps a bit more for 20 minutes on a number of occasions, in a sauna. It wasn't unpleasant, except for when I was on a bench near the ceiling, and somebody dumped some water in the basin of rocks on top of the stove. That steam was scalding!
Yes, having low humidity is critical.
xilman is online now   Reply With Quote
Old 2021-01-18, 15:52   #85
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

222348 Posts
Default

Quote:
Originally Posted by Uncwilly View Post
The US military has done tests and exposed people to over 200C while at the same time cooking a steak in the same area.
Quote:
Originally Posted by Uncwilly View Post
I will dig out the details of the tests I mentioned above later.
From an old Guinness book (from the time when it was a useful reference)
Quote:
The highest dry-air temperature endured by naked men in the US Air Force experiment in 1960 was 400° F [204°C] and for heavily clothed men 500° F [260° C]. (Steaks require only 325° F [162.8 ° C].) Temperatures of 284° F [140° C] have been found quite bearable in sauna baths.
Uncwilly is online now   Reply With Quote
Old 2021-01-18, 16:51   #86
xilman
Bamboozled!
 
xilman's Avatar
 
"𒉺𒌌𒇷𒆷𒀭"
May 2003
Down not across

296016 Posts
Default

Quote:
Originally Posted by Uncwilly View Post
I have retrieved items out of a 550 C furnace before barehanded. Yes, actually picking up items that were at 550. They were low thermal mass, highly conductive, and the contact area was small.

I will dig out the details of the tests I mentioned above later.
At the other end of the scale, I have dipped my hands in liquid nitrogen on a number of occasions.

One of our favourite tricks with newbie chemists was to put some rubber tubing in LN2 and spray them with droplets; then to smash the tubing on a bench to shower them with rubber shrapnel, and finally to stir the Dewar with a forefinger for 30 seconds or so and then hit the bench hard with the same finger.
xilman is online now   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Perpetual "interesting video" thread... Xyzzy Lounge 35 2021-02-28 06:57
"Interesting Word Origins" thread ewmayer Lounge 17 2020-08-20 01:34
Official "Interesting Animal Behavior" thread ewmayer Lounge 3 2016-05-30 15:26
Digicrime interesting link thread xilman Lounge 4 2006-06-04 18:43
Deutscher Thread (german thread) TauCeti NFSNET Discussion 0 2003-12-11 22:12

All times are UTC. The time now is 21:03.

Fri Mar 5 21:03:33 UTC 2021 up 92 days, 17:14, 0 users, load averages: 2.24, 1.77, 1.82

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.