A car engine turns 900 revolutions per minute while idling. How many revolutions does a car engine turn in one second while idling? 7/9/2014 | Julie from Danville, CA | 2 Answers | 0 Votes Mark favorite Subscribe Comment
This is a unit conversion problem 900 rev/min *1min/60sec which is 15 rev/sec 7/9/2014 | Paul A. Comment
If it turns 900 times each minute and there are 60 seconds in a minute then it turns 900/60 times each second 900/60=15 revolutions per second. (900 revolutions/minute)/(60 seconds/minute)=15 revolutions per second. 7/9/2014 | Stephanie M. Comment