Many physical units in German seem to have identical singular/plural forms. For example: 1 Meter, 2 Meter... At the moment the only exception that comes to mind are units of time "1 Sekunde, 2 Sekunden..." (and "Lichtjahr" which gramatically would be the same)
- Is there a reason for this?
- If I say "2 Meter", do I use the plural form of Meter?