(2004? In the experiment of measuring metal wire resistivity, the equipment provided is not only a screw micrometer, a meter ruler, a switch and several metal wires.

(1) The reading of the screw micrometer is d = 0.5mm+5.3x0.01mm = 0.053mm;

(2) The ammeter reading is I = 36.0×10050ma = 72.0ma = 0.072a;

(3) In order to measure multiple groups of data, the partial pressure connection method is adopted; The resistance of metal wire is small, so the ammeter adopts external connection mode;

The circuit is shown in the figure;

(4) according to ohm's law, there are: r = ui.

According to the law of resistance, there are: r =ρls；;

Where: s =14π d2;

Simultaneous solution: ρ = u π d24il;

So the answer is: (1) 0.552 ~ 0.554; (2)0.072; (3) As shown in the figure; (4)UπD24IL, where u is voltage, d is line diameter, I is current, and l is line length.