Question

what is the fastest motion that can be measured in any frame of reference? (1 point)
186,000 m/s
300,000 m/s
300,000 km/s
186,000 km/s

Explanation:

According to the theory of relativity, the speed of light in a vacuum is the fastest speed in the universe. The speed of light in a vacuum is approximately \(c = 3\times10^{8}\text{ m/s}=300000\text{ km/s}\).

Answer:

\(300,000\text{ km/s}\)