[填空题]
A 10.0-m length of wire consists of 5.0 m of copper followed sk o- *m8 gwghax,wx2ao+q;6f by 5.0 m of aluminu8x +w;gq2-o ako,h*ga6xmw sf )9 :s9 xmbqanbm, both of diameter 1.0 mm. Ab asx9q:9b )nm voltage difference of 85 mV is placed across the composite wire.
(a) What is the total resistance (sum) of the two wires? $\approx$ $\Omega$(retain two decimal places)
(b) What is the current through the wire? A(retain two decimal places)
(c) What are the voltages across the aluminum part and across the copper part?
$V_{Cu}$ V(retain three decimal places)
$V_{Al}$ V(retain three decimal places)
