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Old 5th February 2008, 09:35 PM   #461
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Default Re: Assistants

Quote:
Originally posted by John Hope
Here is a picture of my two (tax deductible) assistants.
I call them VHDL and Verilog.
I just learn a little VHDL (1st year Electronic Engineering Student). Nice cats.

James
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Old 5th February 2008, 10:28 PM   #462
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Question:

Start with a perfectly insulated room, temperature at 20C. Add a running refrigerator with the door open, what will happen to the temperature in the room and why?
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Old 5th February 2008, 11:22 PM   #463
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It will go up.

Fridges only move head from one place to another. They also add a little heat of their own. Also, the light in the fridge will add more.

Now, if the room was at 0c, and the bulb had blown, the temp would stay constant.

Of course, there ain't no such thing as dragon...sorry... perfectly insulated rooms.

How is this humour?

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Old 5th February 2008, 11:33 PM   #464
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Quote:
Originally posted by Cal Weldon
Question:

Start with a perfectly insulated room, temperature at 20C. Add a running refrigerator with the door open, what will happen to the temperature in the room and why?

The plane would take off!!!
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Old 5th February 2008, 11:36 PM   #465
SY is offline SY  United States
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The room gets warmer. Second Law.

Quote:
Now, if the room was at 0c, and the bulb had blown, the temp would stay constant.
No, it still goes up. Second Law.
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Old 6th February 2008, 12:19 AM   #466
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The temp of the room will increase. The electricity used by the fridge needs to be converted into something, which, in the end, is heat.

Back off-topic, I concur, the plane will take off.
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Old 6th February 2008, 01:46 AM   #467
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Quote:
Originally posted by Cal Weldon
Question:

Start with a perfectly insulated room, temperature at 20C. Add a running refrigerator with the door open, what will happen to the temperature in the room and why?
If it's in my house the beer will disappear first, followed by the Velveeta Cheese, nacho dip, pickled herring, olives ...the room will fill with hydrogen sulfide, methane and other olfactorily offensive molecules...
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Old 6th February 2008, 05:02 AM   #468
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Two cats, a fridge and a plane in a perfectly insulated room trying to take off ?

The cats will have to be checked in as baggage (unless you hid them in the fridge).
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Old 6th February 2008, 08:46 AM   #469
Nordic is offline Nordic  South Africa
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If the fridge was off in the room, temperature would stay the same....

Power it on

I suspect the heat produced by the motors will add heat.
The cooling elements will try to take some heat from the room (door is open) and then dump it back into the room (inneficiently, but I suspect more efficiently than the process on the coling side)..

So there should be a net gain of temperature...

Even if it was just a fan, the temp would go up, because there is a net increase of energy in the room... through the AC cable
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Old 6th February 2008, 08:53 AM   #470
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Default Fridge - continued

In South Africa the following will likely take place:
1. The fridge won't work because the power has been cut off most of the day for 'Load Shedding'.
2. The room will lose its insulative properties because people from the 'informal settlements'.will steal 90% of the insulating material to line their shacks. What's left will be pinched by management to use as sound deadening material in the speakers they are building.
3. The insurance weasels won't pay for the spoiled food in the freezer.
4. The plane won't be able to take off because it's broken.

In England the following will likely take place:
1. The fridge will be confiscated by the Dept of the Environment on the grounsds that it's causing degeneration of the ozone layer.
2. The room will lose its perfect insulative properties because Health and Safety Executive have banned the use of the insulating material on the grounds that it has been found to cause cancer in 0.1% of stillborn orang-utangs.
3. The evil insurance weasels won't pay for the spoiled food in the freezer.
4. The plane won't be able to take off because the airport personnel are on strike.

Let's hear it from your part of the world, people. . . .
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