Question

A human hair has a thickness of about 70micrometers. What is this in kilometers?

a) 70 micrometers * 10^-6 meters * 1 kilometer
1 micrometer 1000 meters

Answer 1

A human hair has a thickness of about 70 micrometers, which is equivalent to 70 x 10^-12 kilometers when converted using the appropriate conversion factors.

Step-by-step explanation:

The thickness of a human hair is about 70 micrometers. To convert this measurement into kilometers, we must remember that 1 micrometer (μm) is equal to 1 x 10-6 meters (m), and there are 1,000,000 meters in a kilometer (km). Therefore, converting micrometers to kilometers involves multiplying by 10-6 to get meters, and then dividing by 1,000,000 to get kilometers. The calculation would look like this:

• 70 μm * 1 x 10-6 m/μm = 70 x 10-6 m
• 70 x 10-6 m / 1,000,000 m/km = 70 x 10-12 km

So, the thickness of a human hair in kilometers is 70 x 10-12 kilometers.