I have a question relating to relativistic time dilation and thermodynamics. I have put the question in the context of a thought experiment. This I have done as I can not find the particular terminology needed to ask a more succinct question. I have also taken some liberty to try to make the question more enjoyable to read. A brilliant but mad scientist removes the living, conscious brain and eyes from a test subject, Eric, and sustains Eric's disembodied mind, with sight, in a glass tank with nutrient fluid. But Eric's view of the world is limited to the dark cupboard he has been placed in and a keyhole in the cupboard door. Through the keyhole is the laboratory of his captor, however the view is narrow and he can make out only a pendulum on what could be a chronometer on a desk. Suspended in space and deprived of all but one of his senses, Eric's existence was bleak. Determined not to let his predicament undo what was left of his sanity, Eric directed his attention. He observed that the pendulum was in motion and performed its intended function, swinging side to side in a regular, periodic motion. This marked time for him where he otherwise had no notion. With no fingers or toes to tap, heart beat or teeth to chatter, Eric could only mark time by recalling songs and tunes. His experience of time passing was entirely subjective if not for the pendulum. Each oscillation of the pendulum marked a unit of time and those units of time appeared to pass relatively quickly over some large periods of time (he estimated to be about two hours), and relatively slow over other, large periods of time. This observation Eric attributed to his state of mind. For example, a large period time before he slept was associated with a relative quickening of pendulum, that is, a time when he was drowsy. The reverse effect was observed when he was alert. Days could have passed but Eric could not know for sure as the laboratory lighting was artificial and not influenced by diurnal cycle when a mote of dust, suspended in his nutrient solution, appeared before his eye. Caught in an eddy, the mote appeared to possess precise cyclical motion. He now observed two oscillators which he could compare and for a while, they were perfectly synchronous. In time, the pendulum and mote became asynchronous. Not in a constant manner but rather the oscillation of the pendulum was increasing to become relatively faster. It could be argued, thought Eric, that the oscillations of the mote were decreasing to become relatively slower, however the relative transpiration of time would only confuse that which was to happen next. While his mote remained at constant oscillation, the oscillation rate of the pendulum increased to such a rate that it was a blur. Could it be, thought Eric, that time outside his cupboard was transpiring much faster? Or could the chronometer instead be hot, unwinding its spring faster and faster as the increase in kinetic energy drove the mechanism to run faster and a faster? How can Eric tell the difference? Eventually, the pendulum oscillated at near light speed compared to his mote. If the pendulum had within it another, miniature chronometer, would the same relativistic time dilation effects be observed when taking measurements from this second chronometer if the pendulum was hot as compared to an increased transpiration of time? Thanks in advance.