How to convert between nm, um, mm, m and km

• What are the different units of length mentioned in the video?

  Nanometers, micrometers, millimeters, meters, and kilometers
• Why do we use different units of length?


  Each unit is 1,000 times bigger or smaller than the one next to it
• How many times bigger is a kilometer than a meter?


  1,000 times bigger
• How do you convert a value into a larger unit?

  You divide the number by 1,000 for each place you move up the scale
• What is the conversion of 6 mm to meters?


  0.006 m or $6 \times 10^{-3} \text{ m}$
• What is the conversion of 0.006 m to kilometers?


  0.006 km or $6 \times 10^{-6} \text{ km}$
• How do you convert a value to a smaller unit?

  You multiply the number by 1,000 for each place you move down the scale
• What is the conversion of 6 mm to micrometers?


  6,000 micrometers or $6 \times 10^{3} \text{ micrometers}$
• What is the conversion of 6 mm to nanometers?


  6 million nanometers or $6 \times 10^{6} \text{ nanometers}$
• How do you convert 340 nanometers to millimeters?


  Divide by 1 million or convert through micrometers first
• What is the conversion of 340 nanometers to micrometers?


  0.34 micrometers
• What is the conversion of 0.34 micrometers to millimeters?


  0.0034 mm or $3.4 \times 10^{-4} \text{ mm}$
• What are the sizes of some common objects in relation to nanometers and micrometers?


  • Atoms: 0.1 to 0.5 nanometers
  • Glucose: ~1 nanometer
  • Viruses: ~100 nanometers
  • Bacteria: ~1 micrometer
  • Animal and plant cells: 10 to 100 micrometers
  • Human hair: ~100 micrometers wide
• What is the smallest size visible to the naked human eye?

  About 100 micrometers
• What is the resolution limit of an electron microscope?


  About 0.1 nanometers
• What is the relationship between centimeters, millimeters, and meters?


  • 1 cm = 10 mm
  • 100 cm = 1 m
  • To convert cm to m: divide by 100
  • To convert cm to mm: multiply by 10
• How do you convert 30 cm to nanometers?


  30 cm to mm: 300 mm, then to micrometers: 300,000 micrometers, then to nanometers: 300 million nanometers or $3 \times 10^{8} \text{ nanometers}$
• What should you do if you want to practice questions on this topic?

  • Click on the link in the description or pinned comment
  • Access the platform for practice questions
  • Review the lesson for the video content