In 1828, the diameter of the U.S.dime was changed to approximately 18 mm.What is this diameter when expressed in nanometers? A)1.8 × 10⁹ nm B)1.8 × 10⁷ nm C)1.8 × 10¹ nm D)1.8 × 10^-5 nm E)1.8 × 10^-10 nm

Question

Quizplus · Accepted Answer

We can convert 18 mm to nanometers by multiplying by 10^6 (to convert from mm to micrometers) and then by 10^9 (to convert from micrometers to nanometers):

18 mm * 10^6 * 10^9 nm/mm = 1.8 x 10^10 nm

Therefore, the answer is B, 1.8 × 10^10 nm.

In 1828, the Diameter of the U