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#3278892 - 02/12/14 02:17 AM Science teacher's take on explosives
Shannow Offline


Registered: 12/12/02
Posts: 33489
Loc: Oz
My neighbour had us in stitches the other day.

He's (amongst other things) a highschool science teacher, and some of the boys asked him to show them how to make explosives.

He explained to them that he couldn't, as they already had difficulty counting to ten using both hands, and he didn't think that they'd be very good at all with fractions

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#3278906 - 02/12/14 03:27 AM Re: Science teacher's take on explosives [Re: Shannow]
Andy636 Offline


Registered: 12/30/10
Posts: 688
Loc: Romania
A fast google search can fix that itch smile

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#3278961 - 02/12/14 07:01 AM Re: Science teacher's take on explosives [Re: Shannow]
Danno Offline


Registered: 10/07/12
Posts: 1293
Loc: Northern Ontario, Canada
And bring the attention of NSA and the Feds.

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#3278976 - 02/12/14 07:20 AM Re: Science teacher's take on explosives [Re: Danno]
Kira Offline


Registered: 08/19/10
Posts: 2556
Loc: Champlain/Hudson Valley
As it should

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#3278985 - 02/12/14 07:30 AM Re: Science teacher's take on explosives [Re: Shannow]
Danno Offline


Registered: 10/07/12
Posts: 1293
Loc: Northern Ontario, Canada
Yup

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#3279058 - 02/12/14 08:24 AM Re: Science teacher's take on explosives [Re: Shannow]
andyd Offline


Registered: 09/25/04
Posts: 4933
Loc: Marshfield , MA
Meh the explosions we used to make with welding gases, magnesium powder, gasoline, etc, would have had us up on terrorism charges. We lived, no fingers were lost, singed eye brows grew back. Part of growing up in 50s-60s
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#3279856 - 02/12/14 07:02 PM Re: Science teacher's take on explosives [Re: Shannow]
Trajan Offline


Registered: 07/16/05
Posts: 3730
Loc: SE PA
Made a cannon in school out of a thick pipe about 6 inches long.

Drilled it half way down, then a small hole in the side.

Stick it in the ground, pack it full of match heads, stick match in the side hole.

Light it, step back. Nice cheap noisemaker.
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Lack of harm is not proof of benefit.

There are in fact two things, science and opinion; the former begets knowledge, the later ignorance. Hippocrates





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#3280211 - 02/13/14 01:05 AM Re: Science teacher's take on explosives [Re: Shannow]
Andy636 Offline


Registered: 12/30/10
Posts: 688
Loc: Romania
As kids we had an 8 inch by 14 ft pipe with one end welded shut and a small hole drilled that we filled with oxyacetylene.

Bring a flame next to the drilled whole and the windows on a 100 meters radius would rattle.

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#3280501 - 02/13/14 09:53 AM Re: Science teacher's take on explosives [Re: Andy636]
pandus13 Offline


Registered: 08/12/11
Posts: 1114
Loc: Chicago,IL,USA
Originally Posted By: Andy636
As kids we had an 8 inch by 14 ft pipe with one end welded shut and a small hole drilled that we filled with oxyacetylene.

Bring a flame next to the drilled whole and the windows on a 100 meters radius would rattle.

there goes your snow clearing problems.....
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#3280695 - 02/13/14 01:01 PM Re: Science teacher's take on explosives [Re: Shannow]
SteveSRT8 Offline


Registered: 10/10/08
Posts: 17570
Loc: Sunny Florida
My favorite explosive adventure was iodine and ammonia mixed, then strained out the precipitate.

As it dries it becomes VERY unstable, we would spread it around the classroom entrance a few minutes before start time!

Lots of fun...
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#3281014 - 02/13/14 05:41 PM Re: Science teacher's take on explosives [Re: Shannow]
Jarlaxle Offline


Registered: 02/02/12
Posts: 6763
Loc: New England
Easiest ever...dry ice in a soda bottle, left someplace warm. After an hour or two...POP!
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#3281329 - 02/13/14 10:27 PM Re: Science teacher's take on explosives [Re: Shannow]
morris Offline


Registered: 08/24/08
Posts: 3681
Loc: ks, wichita
i have to much trouble using an oxyacetylene torch. i dont need anything else.

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#3281421 - 02/14/14 12:34 AM Re: Science teacher's take on explosives [Re: Shannow]
GumbyJarvis Offline


Registered: 08/23/11
Posts: 1698
Loc: Killeen, TX
MRE heater plus water in a bottle
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