Atheistforums.com

Science Section => Science General Discussion => Topic started by: Unbeliever on October 19, 2017, 02:30:16 PM

Title: Cooking/heating without fire
Post by: Unbeliever on October 19, 2017, 02:30:16 PM
I thought some of you might find this useful.

There are ways to heat and cook using only the power of the sun - and really simple to do, as well.

Here's a method using only water and plastic:



https://www.youtube.com/watch?v=eeSyHgO5fmQ


This next uses a Fresnel lens:


https://www.youtube.com/watch?v=XFw7U7V1Hok



https://www.youtube.com/watch?v=jrje73EyKag






Here's an adjustable parabolic mirror made of mylar:




https://www.youtube.com/watch?v=U7o1JGFWOWE




These are all pretty cool methods. When I get a chance I'll be giving them a try. I expect great care should be taken when making and using such things.


Title: Re: Cooking/heating without fire
Post by: Hydra009 on October 19, 2017, 05:18:57 PM
I'd much rather have one of these:

(https://makezine.com/wp-content/uploads/2008/07/archimedes_death_ray.jpg)
Title: Re: Cooking/heating without fire
Post by: SGOS on October 20, 2017, 04:56:01 AM
I don't know.  Some of those contraptions look rather unwieldy.

Honey, what's for dinner?
Baloney sandwiches.
Is that all?
It rained all day, and I couldn't cook anything.
Title: Re: Cooking/heating without fire
Post by: SGOS on October 20, 2017, 05:06:20 AM
Quote from: Hydra009 on October 19, 2017, 05:18:57 PM
I'd much rather have one of these:

(https://makezine.com/wp-content/uploads/2008/07/archimedes_death_ray.jpg)
As a former hunter, I think there should be a deer season for those who like to hunt with a parabolic death ray.  It would be challenging and sportsmanlike.  Give the deer a chance.  But there would still be a general season for the old timers who prefer explosives.
Title: Re: Cooking/heating without fire
Post by: Gawdzilla Sama on October 20, 2017, 09:17:12 AM
There's nothing sporting about using technology to kill dumb animals.
Title: Re: Cooking/heating without fire
Post by: SGOS on October 20, 2017, 09:52:33 AM
Quote from: Gawdzilla Sama on October 20, 2017, 09:17:12 AM
There's nothing sporting about using technology to kill dumb animals.
There was actually a movement in some state years ago to adopt a spear only season.  It was never adopted, and I always wondered if the movement was anything more than a political prank.  It did make the news, although not as some major controversy, just as an entertaining news article.
Title: Re: Cooking/heating without fire
Post by: Gawdzilla Sama on October 20, 2017, 10:15:04 AM
Quote from: SGOS on October 20, 2017, 09:52:33 AM
There was actually a movement in some state years ago to adopt a spear only season.  It was never adopted, and I always wondered if the movement was anything more than a political prank.  It did make the news, although not as some major controversy, just as an entertaining news article.
I went along as back-up gunner for a guy who was hunting razorbacks with a bow and arrow. He had big round ones so I agreed to try to help him be alive at the end of the hunt. When he got his boar I complimented him on putting his bolt through an eye. He slowly sank to the ground, shaking visibly.

"I was aiming for his mouth."
Title: Re: Cooking/heating without fire
Post by: Unbeliever on October 20, 2017, 01:12:40 PM
Quote from: Hydra009 on October 19, 2017, 05:18:57 PM
I'd much rather have one of these:

(https://makezine.com/wp-content/uploads/2008/07/archimedes_death_ray.jpg)
Too bad Archimedes didn't have mylar - he could've won a sea battle single-handedly!
Title: Re: Cooking/heating without fire
Post by: Unbeliever on October 20, 2017, 01:14:38 PM
Quote from: SGOS on October 20, 2017, 09:52:33 AM
There was actually a movement in some state years ago to adopt a spear only season.  It was never adopted, and I always wondered if the movement was anything more than a political prank.  It did make the news, although not as some major controversy, just as an entertaining news article.
I'd rather people had to catch/kill deer with their bare hands - now that would be sporting!
Title: Re: Cooking/heating without fire
Post by: SGOS on October 20, 2017, 06:04:32 PM
Quote from: Unbeliever on October 20, 2017, 01:14:38 PM
I'd rather people had to catch/kill deer with their bare hands - now that would be sporting!
I admit, spears are still high tech, even cutting edge years ago.
Title: Re: Cooking/heating without fire
Post by: Baruch on October 20, 2017, 06:59:57 PM
Quote from: Unbeliever on October 20, 2017, 01:14:38 PM
I'd rather people had to catch/kill deer with their bare hands - now that would be sporting!

Noodling for fish.  I know a guy who has done that.
Title: Re: Cooking/heating without fire
Post by: Baruch on October 20, 2017, 07:00:59 PM
Quote from: SGOS on October 20, 2017, 06:04:32 PM
I admit, spears are still high tech, even cutting edge years ago.

Odysseus hunted wild boar with a spear as a young man, but the boar sometimes won.  He could be identified by a scar one of the boars left in him.
Title: Re: Cooking/heating without fire
Post by: Cavebear on October 23, 2017, 05:42:39 AM
Quote from: Unbeliever on October 20, 2017, 01:14:38 PM
I'd rather people had to catch/kill deer with their bare hands - now that would be sporting!

There was a situation decades ago where, if I had had a spear, I would have dropped on a deer from a stand.  I almost did it with an arrow (being 16 and rather crazy), but it didn't seem quite sufficient.  I think with a spear, yes.