Tagged Questions
10
votes
1answer
883 views
Is it possible to stack liquids of different density scale on top of each other?
I came across q picture on the net and now I'm skeptical that it's possible. I know liquids from different density scale wouldn't mix easily but stacking them on top of eachother with perfectly ...
15
votes
1answer
5k views
Is biting a gold coin a working method to verify its authenticity?
Julia Murray & Kelsey Serwa
In movies you commonly see treasure hunters, pirates, thieves, ...
bite down on a gold coin to verify it's real gold.
(Gold Medal winners often pose with the ...
21
votes
2answers
2k views
Would a human's blood suddenly boil (or eyes/body explode) in a vacuum?
I was once given a question in the popular quiz-show game, You Don't Know Jack, that went something like:
You find yourself suddenly ejected into space. Which of these gruesome things happens first?
...
10
votes
3answers
1k views
Man using “water as fuel” for a welding machine? (H₂O → HHO)?
I saw a while back a YouTube video that appears to show a news report of a man who patented technology to turn water into HHO.
The video makes some big claims — 161 km (100 mi.) on 0.1 L (4 ...
72
votes
3answers
10k views
Do atoms exist?
There are plenty of examples of people doubting ([1],
[2],
[3],
[4],
[5]) or denying ([6],
[7],
[8]) the existence of atoms.
Is there any compelling evidence for the existence of atoms? Has anyone ...
40
votes
2answers
3k views
Are old glass panes thicker on the bottom due to “flow”?
I ran into this common belief today, and was surprised that it has not been addressed here before.
I think this belief is common enough that most anyone has heard it. Especially if they are touring ...
4
votes
1answer
355 views
What is the explanation for the Mentos-Diet Cola fountain? [closed]
Adding Mentos confectionery to fizzy drinks such as Diet Cola produce a surprisingingly vigorous reaction, which have lead to many videos.
Explanations such as the ones in American Journal of ...
20
votes
1answer
2k views
Can you melt gold in a regular campfire?
As seen on Game of Thrones the TV series, some gold is melted in a regular campfire.
http://www.youtube.com/watch?v=J74JEloKC3M
Is this physically and chemically possible?
28
votes
2answers
12k views
Can you recharge non-rechargeable alkaline batteries?
There are conflicting reports of whether it is possible to safely recharge alkaline batteries (not lithium) that are not sold as rechargable. The packaging for batteries regularly has cautions ...
23
votes
1answer
1k views
Is alcohol for consumption tested for carbon-14 radioactivity to be considered legal?
I just viewed this interesting video about radioactive ethanol from plants as opposed to non-radioactive ethanol from crude oil. In it, the professor says he's heard it's illegal in the USA to sell ...
