How many kilometers is the sea?

The nautical mile is the international unit of measurement, 1 nautical mile = 1.852 km. It is equal to the arc length corresponding to 1 minute latitude on the earth's elliptical meridian (once equal to 60 minutes, a circle is 360 degrees). Because the meridian circle of the earth is an ellipse with different curvatures at different latitudes, the corresponding arc lengths of latitude 1 are not equal.

Kilometer, also called kilometer, comes from the English word kilometer. In later units, people directly used km as a suffix to represent kilometers. 1790, the committee of scientists formed in France formally decided to sue, taking the kilometer as the national general unit of measurement, which is defined as "one third of the distance traveled by light in a vacuum for one second".

Length unit and conversion:

1, nanometer

1 nanometer (nm) = 10 (-9) meter (m).

2. mm

1 mm = 10 (-3) meters (meters).

3. cm

1 cm = 10 (-2) m (m).

4, decimeter (dm)

1 decimeter (dm)=0. 1 meter (m).

5. Kilometers (kilometers)

1 km =1000 m (m).

6. Kilometers (ym)

1 meter (ym) = 10 (-24) meter (m).

7. Zepto

1 m = 10 (-2 1) m (m).

8.Ami (am)

1 Ami(AM)= 10(- 18)m(m)。

9. Nanometer

1 femto meter (FM) = 10 (- 15) meters (meters).

10, micron (micron)

1 micron (micron) = 10 (-6) meter (meter).

Reference to the above content: Baidu Encyclopedia-Li Hai

Reference to the above content: Baidu Encyclopedia -km