How much current can a copper conductor that is 2 meters long, 0.003m thick, and 0.00045m wide continuously carry? Also, the resistance is about 0.02 Ohms.
Assuming your conductor is flat, its cross-sectional area is 1.35mm. The resistivity of pure copper at 20°c is 1.72*10-8 Ohms/m. Resistance = resistivity x length / area, so your 2m length should measure about 0.026 Ohms.
The equivalent circular wire diameter is 1.31mm, which is slightly larger than 16AWG ( typically rated at 20A in a single core cable). At 9A it will drop about 0.23V and dissipate about 2W over its entire length.