(FUVEST - 2019 - 1 FASE) What time is it? That sim

(FUVEST - 2019 - 1ª FASE)

       What time is it? That simple question probably is asked more
       often today than ever. In our clock‐studded, cell‐phone society,
       the answer is never more than a glance away, and so we can
       blissfully partition our daysinto eversmaller incrementsfor ever
5     more tightly scheduled tasks, confident that we will always
       know it is 7:03 P.M.
       Modern scientific revelations about time, however, make
       the question endlessly frustrating. If we seek a precise
       knowledge of the time, the elusive infinitesimal of “now”
10   dissolves into a scattering flock of nanoseconds. Bound by the
       speed of light and the velocity of nerve impulses, our
       perceptions of the present sketch the world as it was an instant
       ago—for all that our consciousness pretends otherwise, we can
       never catch up.
15   Even in principle, perfect synchronicity escapes us. Relativity
       dictates that, like a strange syrup, time flows slower on moving
       trains than in the stations and faster in the mountains than in
       the valleys. The time for our wristwatch or digital screen is not
       exactly the same as the time for our head.  
20   Our intuitions are deeply paradoxical. Time heals all
        wounds, but it is also the great destroyer. Time is relative but
        also relentless. There is time for every purpose under heaven,
        but there is never enough.  

                                                       Scientific American, October 24, 2014. Adaptado.

No texto, a pergunta “What time is it?” (L. 1), inserida no debate da ciência moderna sobre a noção de tempo,