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Yes it does. thermodynamics would still work in the absence of gravity and that also defines the arrow of time.
Try clarifying again. If you are asking whether it is necessary to have existence of matter and energy (and thus gravity) for time to be considered then possibly yes. If you are asking whether we need to consider gravity in any discussion of time then definitely no.
Quote from: imatfaal on 06/02/2012 15:26:01Try clarifying again. If you are asking whether it is necessary to have existence of matter and energy (and thus gravity) for time to be considered then possibly yes. If you are asking whether we need to consider gravity in any discussion of time then definitely no."If... it is necessary to have existence of matter and energy (and thus gravity) for time to be considered then possibly yes."If that is true then the following has to be false. "If you are asking whether we need to consider gravity in any discussion" (on the nature) "of time then definitely no."We know that a graduated gravitational potential due to mass dilates local time as viewed from the reference frame of a distant observer. How then can you say "If you are asking whether we need to consider gravity in any discussion" (on the nature) "of time then definitely no."The local gravitational potential quite obviously does affect the local time dilation factor as viewed from the reference frame of a distant observer. Therefore gravity needs to be considered in any discussion on the nature of time.
So yes you can ignore time dilation by either doing the experiment within the frame of the interaction or by compensating for frame differences. The time dilation does not affect the reaction - it affects the observation of it.
Quote from: imatfaal on 07/02/2012 10:59:56 So yes you can ignore time dilation by either doing the experiment within the frame of the interaction or by compensating for frame differences. The time dilation does not affect the reaction - it affects the observation of it.Thinking about it, I believe you are wrong. It affects the amount of energy required to do the reaction and results in higher entropy.The time dilation factor does affect the reaction in as much as entropy increases at a higher rate in a greater time dilation than in a lesser one. You need more energy to do anything (including any chemical reaction, experiment etc.) in a greater time dilated (higher gravitational) potential than in a lower time dilated (lower gravitational) potential. This is the answer I was looking for but had as then not found in answer to Soul Surfer and JP earlier in this thread.
.... in a greater time dilated (higher gravitational) potential than in a lower time dilated (lower gravitational) potential.