1 km per hour = 100,000 cm per 3,600 seconds = 27.77... cm per second
1 mile=1.609344 kilometers 5.644 miles x 1.609344=9.083137536 kilometer per second
About 3,712.8 km/h
Meters per second x 0.001 = km per second. So, 694 x 0.001 = 0.694 km per second.
-- take the number of meters per second -- divide it by 1,000 -- the result is the number of kilometers per second