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Questions tagged [machines]

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6 votes
2 answers

Was Hoysaleswara Temple built with lathes?

I saw this very popular video a few days ago: Hoysaleswara Temple, India - Built with Ancient Machining Technology? Here is a related article. It claims the following If you look closely, you ...
user13107's user avatar
  • 823
7 votes
0 answers

Have refrigerators become less reliable over time?

An often recited quip, both in my home and in popular culture, is "They don't make them like they used to." Most recently, the quote was brought up when our refrigerator stopped dispensing filtered ...
Mark Miller's user avatar
36 votes
1 answer

Does rubbing a rejected coin against the ticket machine make it likelier to be accepted?

When a rapid transit ticket machine in Germany refuses to accept a coin, I've often seen the ticket-buyer scratch the same coin on the machine's metal surface before re-trying it. Some scratch with ...
Anko's user avatar
  • 1,991
4 votes
1 answer

Time traveling machine invented?

Yesterday a news report said that an Iranian scientist claims to have invented a 'time machine' that will allow one to 'travel' up to 8 years into the future to predict with 98% accuracy the future ...
Popopo's user avatar
  • 301
10 votes
1 answer

Was a 5000 year old flying machine discovered in Afghanistan?

If you search on Google "5000 year old flying machine discovery", there are lot of article and YouTube videos available claiming 5000 year old flying machine called "Vimana" discovered in Afghanistan. ...
Madhu's user avatar
  • 516
2 votes
3 answers

Can a 3D scanner work as shown in this youtube video?

3d printers look pretty awesome, but I can't help but think that this youtube clip was a little doctored. Not because of the printer, but because of the scanner. Can they really figure out the ...
Peter Turner's user avatar
  • 1,187
3 votes
1 answer

How powerful are air cannons?

I wondered how powerful air blasters are. Is it possible for one to be so powerful that the shock wave passes through walls, floors and ceilings? Could it make bumps on metallic surfaces or at least ...
Raskolnikov's user avatar
11 votes
2 answers

Do air-conditioners need a 3 minute break after being started or stopped?

I have always been told that one should wait (at least) 3 minutes after turning on an air-conditioner before turning it off, and wait 3 minutes after turning off an air-conditioner before turning it ...
yydl's user avatar
  • 823