25 Mar 10
Originally posted by trev33Too easy.
you've got 3 light switches downstairs connecting to three lights upstairs. you're allowed to go upstairs only once without coming back down again and you can't see if the upstairs lights are on from downstairs. how do you work out with three light switches connect to each light? all upstairs lights are off when you begin.
"you're allowed to go upstairs only once without coming back down again"
Go upstairs as many times as you want as long as you always come back down again. The last time you go up (after you've solved the problem), just don't come back down, thus you only went upstairs once without coming back down again.
😀
25 Mar 10
Originally posted by trev33How about this:
you've got 3 light switches downstairs connecting to three lights upstairs. you're allowed to go upstairs only once without coming back down again and you can't see if the upstairs lights are on from downstairs. how do you work out with three light switches connect to each light? all upstairs lights are off when you begin.
Turn one switch on.
Leave one switch off.
Turn the last switch on for, say, two minutes, then turn it off again.
Upstairs, one bulb will be on.
Two bulbs will be off, but one will be warm whereas the other will be cold.
Go back downstairs and resume your normal porn-surfing activities.
25 Mar 10
Originally posted by FreakyKBHIt was a cold cathode fluorescent lamp. FAIL
How about this:
Turn one switch on.
Leave one switch off.
Turn the last switch on for, say, two minutes, then turn it off again.
Upstairs, one bulb will be on.
Two bulbs will be off, but one will be warm whereas the other will be cold.
Go back downstairs and resume your normal porn-surfing activities.
26 Mar 10
Originally posted by trev33Send your kids up to look as you turn each switch on.
you've got 3 light switches downstairs connecting to three lights upstairs. you're allowed to go upstairs only once without coming back down again and you can't see if the upstairs lights are on from downstairs. how do you work out with three light switches connect to each light? all upstairs lights are off when you begin.
🙄
26 Mar 10
Originally posted by FreakyKBHIf I remember my physics right, there is no such thing as cold only the abscence of heat. Took me a while to understand that one.
My Wiki can beat up your bing...
"Despite their name, cold cathodes don't necessarily remain cold as they operate; they can get painfully hot."
UNFAIL
26 Mar 10
Originally posted by FreakyKBHMost do, though. That's why they are used in laptops as backlight. I also doubt that two minutes would be enough to tell the difference.
My Wiki can beat up your bing...
"Despite their name, cold cathodes don't necessarily remain cold as they operate; they can get painfully hot."
UNFAIL
27 Mar 10
Originally posted by expuddlepirateYou could just as easily say there is no heat, only cold. They're two extremes describing kinetic energy in a large number of tiny particles.
If I remember my physics right, there is no such thing as cold only the abscence of heat. Took me a while to understand that one.