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).
how fast does an asteroid travel when it hits earth? like at what speed does it hit earth? also, how big a crater would a asteroid the size of a donkey make if it hit the earth at 19200 miles per hour? Source(s): fast asteroid travel hits earth: https://shortly.im/3efme.