If the speed of light is 3 x 10^8 m/s, what is its value in km/s? (2021)

Practice Questions

Q1
If the speed of light is 3 x 10^8 m/s, what is its value in km/s? (2021)
  1. 3 x 10^5 km/s
  2. 3 x 10^6 km/s
  3. 3 x 10^7 km/s
  4. 3 x 10^8 km/s

Questions & Step-by-Step Solutions

If the speed of light is 3 x 10^8 m/s, what is its value in km/s? (2021)
  • Step 1: Understand that the speed of light is given as 3 x 10^8 meters per second (m/s).
  • Step 2: Know that 1 kilometer (km) is equal to 1000 meters (m).
  • Step 3: To convert from meters to kilometers, you need to divide the number of meters by 1000.
  • Step 4: Take the speed of light in m/s, which is 3 x 10^8 m/s.
  • Step 5: Divide 3 x 10^8 by 1000 to convert it to km/s.
  • Step 6: When you divide 3 x 10^8 by 1000, you can rewrite it as 3 x 10^8 / 10^3.
  • Step 7: This simplifies to 3 x 10^(8-3) = 3 x 10^5 km/s.
  • Step 8: Therefore, the speed of light in kilometers per second is 3 x 10^5 km/s.
  • Unit Conversion – Understanding how to convert between different units of measurement, specifically from meters per second (m/s) to kilometers per second (km/s).
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