A meter is defined as the distance travelled by light in free space in 1/299,792,458th of a second.
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pm is short for pico-meter, or 10-12 meter. That's a trillionth of a meter (using the short scale), or a billionth of a meter on the long scale.pm is short for pico-meter, or 10-12 meter. That's a trillionth of a meter (using the short scale), or a billionth of a meter on the long scale.pm is short for pico-meter, or 10-12 meter. That's a trillionth of a meter (using the short scale), or a billionth of a meter on the long scale.pm is short for pico-meter, or 10-12 meter. That's a trillionth of a meter (using the short scale), or a billionth of a meter on the long scale.
That doesn't make sense. Square meter is 2D. Cubic meter is 3D. To attempt to answer your question... A square meter is one meter long and one meter wide. A cubic meter is one meter long, one meter wide, and one meter tall.
A meter ruler
1 meter = 100 centimeters
1 meter