Final answer:
To convert 39 m/s to km/h, multiply by 3.6.
Step-by-step explanation:
To convert 39 m/s to km/h, we can use the conversion factor 1 m/s = 3.6 km/h. Therefore, we can multiply 39 m/s by 3.6 to get the equivalent speed in km/h.
39 m/s x 3.6 km/h = 140.4 km/h
So, 39 m/s is equal to 140.4 km/h.