Conversion factors

Question

An earthworm moves 8 inches in 1 hour. What is that speed in feet per second ?

Answer 1

8 inches per hour

= 8/12 feet per 60 x 60 seconds

= 2/3 ft per 3600 sec.

= 2/3(3600) = 2/10800 = 1/5400 ft/sec = about 1.852 x 10^-4 feet per second or

0.0001852 feet per second= 1/5,400 feet per second