Question

Charlotte is running at a rate of 23 /h. What is Charlotte’s speed in /s?

Answer 1

0.00638

Explanation:

Use some dimensional analysis. There are 60 minutes in 1 hour, and 60 seconds in 1 minute:

`(23)/(1) (units)/(hour) * (1)/(60) (hour)/(minutes) * (1)/(60) (minute)/(seconds)`

The units of hour will cancel, minutes will cancel, leaving the units of seconds:

`(23)/(60* 60) (units)/(seconds) = 0.00638 (units)/(second)`