Physical quantities are measured as 'nu' where n is the magnitude and u is the unit. For example: A boy measured the length of a room as 3 m. Here 3 is the magnitude and m (metre) is the unit. 3 m can also be written as 300 cm.
No. The only European units I know of who were able to sustain that. kind of speed on foot were Foreign Legion-where the standard was 50. km per day. Other infantry units usually come in under 20 miles a day. (and closer to 12-15 miles per day).
A modern fully-laden aircraft carrier typically has a maximum speed of 30 knots, or about 34.5 miles per hour. The USS Forrestal has a listed speed of 33 knots... It's likely that she can actually do a little better than that, the military love to under-specify. yeah the admitted speeds are in the 30-35kts range. The real numbers are classified. I dont have the firm numbers since I wasnt in engineering or anything of the sort, but believe me when I say they go faster than that. It is, of course, known that the admitted speed is a bunch of BS. If I had to guess I would put it in the range of 40-45kts. In good weather and calm seas I might add.