User blog comment:MachineGunSuper/Supertasks/@comment-35470197-20180826045421

A computer has only bounded memory, and hence can do at most \(N\) tasks per second, where \(N\) is a sufficiently large natural number. If you try to have it execute more tasks, then it will allerts the lack of memory or just halt in an unexpected way. Therefore you are not allowed to take the limit of the behaviours of computers and monitors.

On the other hand, physical phenomena (e.g. movement of a bounced ball and a race of Achilles and Tortoise) are not programmed tasks, and hence can occur unboundedly many times per second (in classical dynamics).

Sorry, I could not understand what the main two questions mean.