 ChatsUSA
» ChatsUSA Entertainment
» Fun and Games
» Question of the day
»
Kay's QOD 12
|
 |
07-21-2008, 11:07 AM
|
#1 (permalink) | ||||||||
CUSA Moderator
Posts: 4,609
Blog Entries: 1
Join Date: Aug 2007
Location: Belgium
        |
Kay's QOD 12
While putting together some explosive devices during a deployment, and EOD specialist needs to measure exactly 15 minutes. His watch has been broken in combat and he only has a bunch of detonation cord. The only thing that he knows about them is that they burn up in exactly one hour, once they are lit one cord = one hour). The speed at which they burn however, is not constant. How can he determine a 15 minute period by only using these cords? Good luck 
__________________
 |
||||||||
|
|
|
||||||||
|
07-21-2008, 01:04 PM
|
#2 (permalink) | ||||||||
The End Of The Road
Posts: 12,889
Blog Entries: 1
Join Date: Apr 2008
Location: London,England
Age: 17
      |
Cut them into quarters?
No. The cords don't burn at a constant speed, there is no relation between the length of the cord and the time it needs to burn, so when half of the length of the cord is gone, it does not mean that exactly half an hour has passed.
__________________
Last edited by Kay; 07-21-2008 at 02:54 PM. |
||||||||
|
|
|
||||||||
|
07-24-2008, 09:16 PM
|
#3 (permalink) | ||||||||
The Amazing Oxymoron
Posts: 173
Join Date: Jun 2006
Location: Florida, United States
Age: 18
|
Does the solution involve using only one cord? (as opposed to more than one) No, you need more than one
Does the solution only involve one or more whole cords? Yes, whole cords (to begin with  hint)
__________________
 Last edited by Kay; 07-31-2008 at 02:05 PM. |
||||||||
|
|
|
||||||||
|
07-31-2008, 11:32 PM
|
#5 (permalink) | ||||||||
Joy Seeker!
Posts: 11,325
Blog Entries: 3
Join Date: Dec 2007
Location: ...just over the edge in Texas USA
Age: 55
       |
String the cords together and make a trap for someone passing by that has a watch he can use ROFL.
LMAO! Meanie!
__________________
Last edited by Kay; 08-06-2008 at 02:40 AM. |
||||||||
|
|
|
||||||||
|
08-06-2008, 03:43 AM
|
#6 (permalink) | ||||||||
|
Joy Seeker!
Posts: 11,325
Blog Entries: 3
Join Date: Dec 2007
Location: ...just over the edge in Texas USA
Age: 55
|
He constructed a homemade sundial to time 15 mins?
Hey, it could happen  Used his 3 minute egg timer 5 times? Haha, no to both silly
__________________
Last edited by Kay; 08-09-2008 at 03:13 PM. |
||||||||
|
|
|
||||||||
|
08-08-2008, 01:51 PM
|
#8 (permalink) | ||||||||
|
The End Of The Road
Posts: 12,889
Blog Entries: 1
Join Date: Apr 2008
Location: London,England
Age: 17
|
He shoudl light 1 cord at both ends and the second cord at one end.
When the first cord burns out, he should light the second cord at the other end.The time between now and the second cord burning out completely is 15 mins. Well now ... CONGRATS! You got it! Points are on their way 
__________________
Last edited by Kay; 08-09-2008 at 03:17 PM. |
||||||||
|
|
|
||||||||
|
08-09-2008, 11:58 AM
|
#9 (permalink) |
|
Guest
Posts: n/a
|
from my experience in the forces i know explosive experts never work alone, so he asked his oppo if he could time it.
or even looked at a clock that was nearby. I needed a setting for my question welshy (and there were no clocks involved)Last edited by Kay; 08-09-2008 at 03:16 PM. |
|
|
|
