Centimeters per hour (cm/h)
Centimeters per hour (cm/hr) is a unit of speed and this unit is the number of centimeters travelled in one hour.
Centimeters per second (cm/s)
Centimeters per second (cm/s) is a unit of speed. One meter is equivalent to 100 centimeters and this unit is the number of centimeters travelled in one second.