Demonstration of atmospheric pressure
26 March 2009, 07:41 PM
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Demonstration of atmospheric pressure
I have always remembered a demo by our physics teacher whereby he boiled some water in a metal can (allowing the steam to drive out the air), screwed on the top and we all watched it crumble under the weight of the atmosphere as it cooled down. Great fun 
Is this still shown to kids in school today?
dl
Is this still shown to kids in school today?
dl
26 March 2009, 07:52 PM
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Was 5 years back, dunno, now. Probably phased out under H&S rules.
I've seen it done with an oil-sized can, 5 litre. Pretty spectacular.
Have you ever seen the "boiling under reduced prerssure" demo?
I've seen water boiling at just over 80 degrees C in a lab
I've seen it done with an oil-sized can, 5 litre. Pretty spectacular.
Have you ever seen the "boiling under reduced prerssure" demo?
I've seen water boiling at just over 80 degrees C in a lab
Last edited by tanyatriangles; 26 March 2009 at 07:54 PM.
26 March 2009, 07:56 PM
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26 March 2009, 07:59 PM
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dl
26 March 2009, 08:05 PM
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26 March 2009, 08:07 PM
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My school couldn't afford a spray gun though
And as for YouTube
dl
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26 March 2009, 10:58 PM
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We had science teachers at my school that would have everyone wanting to study all the sciences.
Physics teacher doing the vacuum test with a sealed vacuum sphere, getting the ENTIRE class trying to pull it apart . Then letting the valve go while we were all pulling with all our strength. CRASH!!!
Biology teacher allowing me to do an autopsy on the recently deceased school rabbit, or the heart dissection that turned the bio lab into an abattoir on a BAD day (I'll never forget seeing that blood clot fly into the thick kids gob.... or the fully thawed cows heart bounce of my mates head). Or ratcicles. I will never forget ratcicles.
Chemistry teacher doing Group 1 metals in water and blowing the fecking bowl apart showering the class in water and pyrex.
Ahhhhh.... they were the days. I'm glad I was taught science before it got boring
Physics teacher doing the vacuum test with a sealed vacuum sphere, getting the ENTIRE class trying to pull it apart . Then letting the valve go while we were all pulling with all our strength. CRASH!!!
Biology teacher allowing me to do an autopsy on the recently deceased school rabbit, or the heart dissection that turned the bio lab into an abattoir on a BAD day (I'll never forget seeing that blood clot fly into the thick kids gob.... or the fully thawed cows heart bounce of my mates head). Or ratcicles. I will never forget ratcicles.
Chemistry teacher doing Group 1 metals in water and blowing the fecking bowl apart showering the class in water and pyrex.
Ahhhhh.... they were the days. I'm glad I was taught science before it got boring
26 March 2009, 11:25 PM
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i did a post the other day about Cambridge Science week
free lectures, for kids, at all the university science faculties, chemistry, physics etc where all this "cool" stuff was demonstrated, and it was all FREE
free lectures, for kids, at all the university science faculties, chemistry, physics etc where all this "cool" stuff was demonstrated, and it was all FREE
27 March 2009, 12:32 AM
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Warm toluene gently, nah ! not enough time, nitric acid, ehh ?
Tri-Nitro-Toluene, that's cool !
Run away quickly !
Those were the days...
dunx
Tri-Nitro-Toluene, that's cool !
Run away quickly !
Those were the days...
dunx
27 March 2009, 01:11 AM
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We had science teachers at my school that would have everyone wanting to study all the sciences.
Physics teacher doing the vacuum test with a sealed vacuum sphere, getting the ENTIRE class trying to pull it apart . Then letting the valve go while we were all pulling with all our strength. CRASH!!!
Biology teacher allowing me to do an autopsy on the recently deceased school rabbit, or the heart dissection that turned the bio lab into an abattoir on a BAD day (I'll never forget seeing that blood clot fly into the thick kids gob.... or the fully thawed cows heart bounce of my mates head). Or ratcicles. I will never forget ratcicles.
Chemistry teacher doing Group 1 metals in water and blowing the fecking bowl apart showering the class in water and pyrex.
Ahhhhh.... they were the days. I'm glad I was taught science before it got boring
Physics teacher doing the vacuum test with a sealed vacuum sphere, getting the ENTIRE class trying to pull it apart . Then letting the valve go while we were all pulling with all our strength. CRASH!!!
Biology teacher allowing me to do an autopsy on the recently deceased school rabbit, or the heart dissection that turned the bio lab into an abattoir on a BAD day (I'll never forget seeing that blood clot fly into the thick kids gob.... or the fully thawed cows heart bounce of my mates head). Or ratcicles. I will never forget ratcicles.
Chemistry teacher doing Group 1 metals in water and blowing the fecking bowl apart showering the class in water and pyrex.
Ahhhhh.... they were the days. I'm glad I was taught science before it got boring
Our chemistry teacher was married to a Fire Brigade arson investigator
If he encountered some ingenious new method in his line of work, you could guarantee that a fortnight later it was being shown to a particular A Level class elsewhere in the county
:
27 March 2009, 01:49 AM
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Good replies folks. But I still don't have an answer to my question: -
Is this still shown to kids in school today?
Perhaps not?? May be just a few kids who do physics GCSE??
I do have a reason for asking
dl
Is this still shown to kids in school today?
Perhaps not?? May be just a few kids who do physics GCSE??
I do have a reason for asking
dl
27 March 2009, 08:37 AM
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and it must be true it's on the Beeb ....
Dave
27 March 2009, 03:40 PM
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I have seen it done-impressive.
Also seen a strong plastic boat fuel tank crumple too when the engine was run and the air inlet screw was forgotten about, so no air could get into the tank to replace the fuel used. Can't believe the engine kept running so long!
Les
Also seen a strong plastic boat fuel tank crumple too when the engine was run and the air inlet screw was forgotten about, so no air could get into the tank to replace the fuel used. Can't believe the engine kept running so long!
Les
27 March 2009, 04:20 PM
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It's videos and teachers with a passion for their subject that makes learning so much more enjoyable. I had a look at some of the other chaps videos and there is a great one about how you could shark/cheat at a "Guess the M&M's in a Jar" competition. It's all about solid states and packing fractions, and stuff I'd usually think would go over my head, but I understood it.
Personally I'd love to get a group of chav kids and teach them science, well, actually I'd let them experiment themselves. The experiment would be; See how close together you can put these pieces of plutonium, and how big a flash you can create
Personally I'd love to get a group of chav kids and teach them science, well, actually I'd let them experiment themselves. The experiment would be; See how close together you can put these pieces of plutonium, and how big a flash you can create
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