It means how many miles an object has travelled per every hour
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Per means "for each", so maybe you walk at 4 miles per hour.
Well, isn't that a lovely question! To convert nanometers per hour to miles per hour, we need to do a little math. Since 1 nanometer is equal to 1.0 x 10^-9 miles, you would divide 170 by 1.0 x 10^9 to find the equivalent speed in miles per hour. Just remember, there's no mistakes in math, just happy little accidents!
miles per hour x 88 = feet per minute
it means if you go about 60 miles per hour for an hour youll move 60 miles away from where you started
It means a distance of 760 miles is traveled every hour.