Critical Thinking 101

[The Kraken]

Do you feel it when an airplane flies over you?

the K

 

[Rick Murchison]

You put a refrigerator in a perfectly insulated room, plug it in and open the door. Does the room get warmer, colder or stay the same?

Roak

Ps. Still relatively easy.

Warmer of course.
Rick

 

[Rick Murchison]

Do you feel it when an airplane flies over you?

the K

Depends on the airplane, doesn't it?
If it's an A7 I'd get all teary and nostalgic
Rick

 

[Rick Murchison]

For this problem, "Sea ice" = ice floating in the sea (icebergs, most of the arctic ocean ice etc)
--
If all the sea ice in the world were to melt, how much change would there be in sea level?
Rick

 

[grazie42]

I think the "theoretical" answer would be that it remains the same as the displacement of frozen water is roughly equal to that of the same water in liquid form...

Just as in a drinkglass that is topped to the brim doesent overflow as the ice melts...

In this instance though, the air above sea-ice is very dry so the melting process would propably result in some watervapour being absorbed into the surrounding air, hence the actual waterlevel would sink "slightly"...

 

[The Kraken]

Know what you mean, Rick. Still look up every time I hear the 330 RPM wop-wop-wop of rotor blades.

Sorry for the hi-jack.

But let us say the internal temperature of the refrigerator is -300 degrees F. All other things being equal, ie the outside temperature of the refrigerator is not affected by the internal temperature, the room is 4'x4'x8', the ambient temperature of the room is 70 degrees F, would not opening the door allow the cold air to escape and, for a period of time reduce the ambient temperature of the room regardless of the heat the electrical motor was outputing?

the K-urious One

 

[Rick Murchison]

Know what you mean, Rick. Still look up every time I hear the 330 RPM wop-wop-wop of rotor blades.

Sorry for the hi-jack.

But let us say the internal temperature of the refrigerator is -300 degrees F. All other things being equal, ie the outside temperature of the refrigerator is not affected by the internal temperature, the room is 4'x4'x8', the ambient temperature of the room is 70 degrees F, would not opening the door allow the cold air to escape and, for a period of time reduce the ambient temperature of the room regardless of the heat the electrical motor was outputing?

the K-urious One

Of course. However, as the question involved "plugging it in," we must reasonably assume the question presupposes that the fridge is on and running, with the eventual result being a warmer room than when we started, regardless of any initial difference in the interior temp of the reefer and the room.
If we're reasonable as well as critical in our thinking, that is...
Rick

 

[miketsp]

I can't believe some of the answers above.

Of course the bird flying around inside a closed object (plane) increases the weight of that object.
What's holding the bird up? Magic?
Action and reaction are equal and opposite.
There is a reaction from the weight of the bird distributed over the floor of the plane.

 

[The Kraken]

Mike, the door is open.

the K

 

[MikeFerrara]

I can't believe some of the answers above.

Of course the bird flying around inside a closed object (plane) increases the weight of that object.
What's holding the bird up? Magic?
Action and reaction are equal and opposite.
There is a reaction from the weight of the bird distributed over the floor of the plane.

Yes. LOL, this thread should be made a sticky!