In materials science, the physical properties of fibers depend heavily on their scale. A single-walled carbon nanotube has a diameter of 1.2 × 10-9 m, whereas a high-performance polymer microfiber has a diameter of 4.8 × 10-6 m.
How many times larger is the diameter of the polymer microfiber compared to the carbon nanotube?
400400400
400040004000
40 00040\,00040000
250025002500
48 exam-style questions on OCR GCSE Chemistry Properties of materials. Each one has a worked solution and a mark scheme showing where the marks go.