In the year 2000, the average size of a transistor in a microprocessor was 250 nanometers. A human hair has a diameter of 70 microns (micrometers). How many transistors fit across a human hair?
A) 280
B) 28
C) 2800
D) 2.8
E) 0.28

Question

Quizplus · Accepted Answer

A human hair is 70,000 nanometers wide (since 1 micron = 1,000 nanometers). Dividing 70,000 nanometers by 250 nanometers (the size of one transistor) gives 280 transistors fitting across a human hair.

In the Year 2000, the Average Size of a Transistor