[Guest]

A man placed 30 litted candles in a enclosed room with no windows,

he closed the door, afraid that the wind from outside will blow

the candles out.

30 mins later, he opened the door and realised that three candles

has been blown out.

And again afraid he had not closed the door

properly, he removed the unlitted candles and quickly closed

the door.

Then another 30 mins later, he opened the door again

to find another five candles blown out.

The room has no windows or fans

so how did the candles get blown out?

Edited March 30, 2010 by mangamathsfreak

[Guest]

draft from opening and shutting the door blew out the candles. Since there was wind outside the door, the draft was probably strong.

[Shakeepuddn]

I second Chic's.

[Guest]

You did say the room was sealed, so with the door adjar, effectively the volume of air on the wrong side of the door, but within the rectangle of the room has to get through the decreasing gap as the door closes and hence accelerates. The first time only 3 blew out and you say that next time he closed the door "quickly" so the draft would have been bigger and blown more out. I'm not sure what the relevance of the 30mins is? You did say they "blew" out.

[Guest]

I have 2 solutions:

The oxygen in the room is slowly being used up by the candles burning and so they start to go out as less oxygen is available for them which is why 5 went out in the second 30 minutes.

Or, the candles are all on one side of the room which is heating the air on that side causing it to raise and forcing the air down on the other side of the room which starts a circular air movement in the room. The longer the candles are in the room the faster the cirulation occurs hence the increase in candles that are blowing out as time goes on.

[Guest]

1. 
   
   

2. its the wind of the door and with him opening and closing the door it makes the candles go out cuz of the strong wind of out side

   
   

date='30 March 2010 - 06:00 PM' timestamp='1269937855' post='222097]

A man placed 30 litted candles in a enclosed room with no windows,

he closed the door, afraid that the wind from outside will blow

the candles out.

30 mins later, he opened the door and realised that three candles

has been blown out.

And again afraid he had not closed the door

properly, he removed the unlitted candles and quickly closed

the door.

Then another 30 mins later, he opened the door again

to find another five candles blown out.

The room has no windows or fans

so how did the candles get blown out?

[DudleyDude]

There is another person in the room who blew out the candles after the door was shut.

[Guest]

did a moth(s) [or other creature] enter the room and kamikaze the flame, as it was attacted to the light??

[Guest]

It was due to the lack of ventilation in an enclosed windowless room w/a closed door. The flames were starting to go out because there wasn;t enough oxygen to sustain them.

Edited June 17, 2010 by mojobrain

[Guest]

The candles went out because they burned down to the bottom, no more wax. (Why else wd the man remove them & not relight them?)

Plausible, but looks like I overlooked a detail here...

Edited June 17, 2010 by mojobrain

[Molly Mae]

The God of Fire (i.e., me) did not authorise the use of the candles.

Honestly, I really only posted this to insert an end to the bold.

[Guest]

An "enclosed room" is simply a room with a door you an closed yourself intol

This room has no windows or fans; it most likely has air vents, though.

This is a party room maybe a catering hall or a hotel. There are several tables hosting birthday parties. A waiter comes out with a few birthday cakes, the sum of their candles totalling 30. After he serves them to each party, he leaves the room thru a door & closes it. 30 minutes later when he comes back to check on everything, he notices a child celebrating his 3rd birthday has blown out the candles. He removes the candles & takes them away thru the door. 30 minutes from then when he makes his rounds of the tables, he sees that a child at his 5th birthday party has blown out her candles. He removes them & leaves the room.

Eureka?

Oh the erroneous assumptions we make...