yes Mel for us ita,the way u pronunce the U is liek for us the A
I think of your "a" more like our short "o", like in the words "on", "top", "plot", etc.
i am sure we're totally barking up the wrong tree. i bet this is based on queue theory or something. fully expect merton and hema to have a deep discussion on poisson distribution over this
Yeah. But Merton's explanation confused me more than his original post did.
Originally Posted by Commander Data
I would participate on the queue-problem if I understood it
BTW: Nobody participated on my room-heating-problem
I won't be answering it but I'm looking forward to reading other people's answers.
Canadian snow is good too.
We have experience.
(If I may add to the weather info, it has snowed once here so far this season.
It's actually snowed a couple other times but there was no accumulation. There is snow on the ground because it's mostly been too cold for it to melt.)
I was in the middle of multiquoting from the old thread when Peta closed it.
This thread needs more science.
Commander Data's living room heating problem:
System: living room
Initial temperature: T1
Final (desired) temperature: T2>T1
If we assume that the room is perfectly insulated, then according to the 1st law of thermodynamics: ΔU=Q, where ΔU is the change in the internal energy of the room and Q is the amount of heat we introduce to the system to increase the temperature from T1 to T2. So basically the energy of the room increases by Q.
However in reality things aren't that simple.
The room is not perfectly insulated and we have to take into account the losses of energy to the environment (through the walls, windows etc). What is needed is an energy balance:
(Energy into the room) = (Energy out of the room) + (Energy Accumulation)
I don't want to get into details and start writing differential equations (for obvious reasons
), but I think one could simplify.
Assuming that we have a heating system with a thermostat programmed to our desired temperature T2, when we turn it on, the room will start warming up (i.e. the rate of heat going into the room will be greater than the rate of heat loss). Therefore the energy of the system increases (we have positive Energy Accumulation). Once the temperature reaches T2 a steady state will be established (ignoring small temperature fluctuations etc). From that point on, Energy Accumulation = 0, i.e. the energy of the system will remain unchanged.
It cannot be a closed system since we are introducing heat into it in the first place.
Correct about the entropy, it always increases etc but I don't think it is something to worry about in this case.
sounds like this thread.
we are no one's pets
But we are adorable.
it smells fishy...
Uh, yeah. For sure.