Final answer:
The size of a typical PC's CPU is characterized by its performance rather than physical dimensions. Pentium chips can execute more than 100 million instructions per second, while supercomputers like China's Taihulight display even more impressive capabilities, achieving speeds of up to 125.44 petaflops.
Step-by-step explanation:
The world size of a typical PC's CPU is not measured in physical dimensions in the same sense as objects are in the real world. Instead, the capacity and capability of CPUs are assessed by their performance. For example, each Pentium chip from a 6-inch wafer is capable of executing more than 100 million instructions per second. In the context of supercomputers, such as those on the Top-500 list, we see a substantial increase in this capacity, with some processors featuring 260 cores and supercomputers like China's Taihulight running at up to 125.44 petaflops. NASA's Ames Research Center's supercomputers have the power to track the motions of over a million objects under their mutual gravitation, which showcases the incredible capabilities of modern computing power in terms of data processing and simulations.