Question

1. which of the following conversion factors are needed to convert from $\mu$m to km? select all that apply.

10 dm = 1m
1,000,000 $\mu$m = 1 m
100 cm = 1 m
1,000 m = 1 km

Explanation:

To convert from micrometers ($\mu$m) to kilometers (km), we need to first convert $\mu$m to meters (m) and then meters to kilometers. The conversion factor for $\mu$m to m is $1,000,000\ \mu\text{m} = 1\ \text{m}$, and the conversion factor for m to km is $1,000\ \text{m} = 1\ \text{km}$. The other options (10 dm = 1 m, 100 cm = 1 m) are conversion factors for decimeters to meters and centimeters to meters, which are not needed for the $\mu$m to km conversion.

Answer:

• $1,000,000\ \mu\text{m} = 1\ \text{m}$
• $1,000\ \text{m} = 1\ \text{km}$