Final answer:
A person with brain functions at 10x speed would theoretically perceive the world as moving more slowly compared to their cognitive processes, similar to high-speed camera effects. However, motion and time perception are relative; as seen in relativity where an astronaut at high speed sees time pass normally while Earth observes it slowing down.
Step-by-step explanation:
If someone's brain were able to receive and process information at 10x the speed of a normal human, theoretically, they would perceive the world as moving slower in comparison to their accelerated cognitive functions. This is analogous to high-speed cameras capturing footage at a high frame rate and then playing it back at normal speed, which makes the world appear in slow motion. However, this concept's practical implications for a human observer are largely speculative, because such an increase in brain function speed would affect many aspects of perception and cognition, and is not currently within human capability.
Consider the example of an astronaut moving at 95.0% of the speed of light relative to Earth. To observers on Earth, the astronaut's actions would appear to take 3.20 times longer due to time dilation as described by the theory of relativity. However, the astronaut would not notice this difference unless they were to look at a clock on Earth, as their own biological and technological time-measuring processes would all be affected equally by the same relative velocity. This demonstrates how motion and the perception of time are relative, not absolute.