Use dimensional analysis to convert 14.5mi/hr to km/s

0.006 48 km/s

Explanation:

1. Convert miles to kilometres

14.5 mi * (1.609 km/1 mi) = 23.33 km

2. Convert hours to seconds

1 h * (60 min/1h) * (60 s/1 min) = 3600 s

3. Divide the distance by the time

14.5 mi/1 h = 23.3 km/3600 s = 0.006 48 km/s