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Discusion Forum ME13-1 : STATES of a PHYSICAL SYSTEM

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AK-47's picture

Submitted by AK-47 on Thu, 02/13/2014 - 15:17

This discussion session is reproduced here from Lecture Notes of Course on Mechanics (2012). The forum has been embedded in the Lecture Notes.<< Click here to see the lecture.>> 

 

Q/T : Where did you come across the state in Physics for the first time?

 

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Thermodynamics.

AK-47's picture Submitted by AK-47 on Thu, 02/13/2014 - 18:43
Thermodynamics.

Yes, in thermodynamics, you

AK-47's picture Submitted by AK-47 on Thu, 02/13/2014 - 18:43
Yes, in thermodynamics, you must have come across the concept of state function. Entropy is a state function and internal energy is a state function. What does state mean to you?

State function is something

AK-47's picture Submitted by AK-47 on Thu, 02/13/2014 - 18:44
State function is something that depends on the initial and final state.

Yes, in thermodynamics, you

kapoor's picture Submitted by kapoor on Thu, 02/13/2014 - 18:50
Yes, in thermodynamics, you must have come across the concept of state function. Entropy is a state function and internal energy is a state function. What does state mean to you?

That is Correct. But my

AK-47's picture Submitted by AK-47 on Thu, 02/13/2014 - 18:45
That is Correct. But my question is what do you understand by state?

Whatever we can measure is

AK-47's picture Submitted by AK-47 on Thu, 02/13/2014 - 18:45
Whatever we can measure is the state. For example, we can measure temperature and that is the state.

Let us be clear. Do you mean

AK-47's picture Submitted by AK-47 on Thu, 02/13/2014 - 18:46
Let us be clear. Do you mean to say that temperature is the state? } Entropy is description of the state? Is that what you want to say?