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unica
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if you open an icebox's door which is in a somewhat large,isolated space,the temperature of the space will become high or low?why?
mgb_phys said:Danger - it might not be homework, it might GW's new science advisor working on a solution to global warming.
i.mehrzad said:Why do we need any variables.
According to the zeroth law of thermodynamics heat will be transferred from the surrounding to the system. Until the two that is the surrondings and the system reach equilibrium.
Why is there any need for variables to be supplied. I don't know. Please could you correct me if i am wrong.
i.mehrzad said:Why do we need any variables.
Danger said:To start with, we don't know the initial temperatures of the interior and exterior of the refrigerator. It's entirely possible that the interior is actually warmer.
unica said:oh...,my original mean focuses on the quantity of heat between the icebox to surroundings and the icebox self-generated by cooling the inner space of it. which is larger between this two quantity of heat? and I am under the assumption that the fridge is a normal, powered fridge, that gets opened in standard room-temperature conditions.i think it should be refer to the 1st and 2nd laws of thermodynamics
Danger said:Given that presumption, you're totally correct. I just prefer not to assume anything.
unica said:this problem is based on the naive problem "if i open an icebox's door, can i cool down the temperature of my house?"
maybe i can illustrate this problem in this way:i only care about two factors in this problem,one is that the inner space of the icebox can transport heat to the surroundings so as to lower the temperature of surroundings,the other is that the icebox would generate heat due to lowering the temperature of the inner space.you can feel the heat on the side surface of the icebox, right?and this heat can heighten the temperature of surroundings.so eventually what is the temperature of the surroundings?does it a little higher or lower than the original one?
Pythagorean said:I encourage you to!
Assumptions are helpful, as long as you declare them and remain aware they are assumptions. This is how theoretical science develops. It's ok to be wrong as long as you can acknowledge it.
HallsofIvy said:A varient problem is this: take a refrigerator that is already at room temperature into a room, plug it in and turn it on (with the door open). what will happen to the temperature in the room?
Danger said:Usually, it's a communications problem based upon either the age of the correspondent or a lack of English fluency
Thermodynamics is a branch of physics that deals with the study of heat and energy and their relationship to work and other forms of energy. It focuses on how energy is transferred and transformed between different systems and the laws that govern these processes.
When an icebox is opened in an isolated space, the temperature of the space will decrease. This is because the icebox contains cold air, and when it is opened, the cold air escapes and mixes with the warmer air in the isolated space. This mixing causes the overall temperature to decrease.
Opening an icebox in isolated space will cause the ice inside to melt at a faster rate. This is because the warmer air in the isolated space will transfer its heat to the ice, causing it to melt. The melting of the ice will also contribute to the decrease in temperature in the isolated space.
The laws of thermodynamics are fundamental principles that govern energy and its transformation. The first law states that energy cannot be created or destroyed, but can only be transferred or converted from one form to another. The second law states that in any energy transfer or transformation, some energy will be lost as heat. The third law states that it is impossible to reach absolute zero temperature.
Thermodynamics applies to many everyday phenomena, such as cooking, heating and cooling systems, and the functioning of engines. It helps us understand how energy is used and transformed in these processes and allows us to make more efficient use of energy. It also plays a crucial role in the development of new technologies and advancements in various fields such as engineering, chemistry, and biology.