Define Mass: Travels Through Time?

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Defining mass as something that interacts with or is affected by time may be more practical than the traditional definition of mass warping spacetime. However, both proposed definitions are considered misleading by participants in the discussion. The conversation suggests that a clearer understanding of mass is needed, as the current definitions may not effectively convey its complexities. Participants express a desire for a more useful and accurate definition. The discussion highlights the ongoing challenge of defining mass in a way that captures its true nature.
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Would it be misleading (to myself) to define mass as that which (insert a group of words like interacts with/experiences/ travels through/ is affected by/...your preference) time? That seems more useful than "that which warps spacetime."
 
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Both of those definitions would be misleading.
 
I agree with Orodruin, both would be misleading.

Is there a particular standard definition of mass that you are having trouble understanding?
 

Thread 'Am I understanding the concept of proper frame of reference?'

MOVING CLOCKS In this section, we show that clocks moving at high speeds run slowly. We construct a clock, called a light clock, using a stick of proper lenght ##L_0##, and two mirrors. The two mirrors face each other, and a pulse of light bounces back and forth betweem them. Each time the light pulse strikes one of the mirrors, say the lower mirror, the clock is said to tick. Between successive ticks the light pulse travels a distance ##2L_0## in the proper reference of frame of the clock...
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