An unknown length of copper wire and a 1.00-meter-long silver wire have the same cross-sectional area and resistance at 20°C. Calculate the length of the copper wire.

The length of the copper wire is 0.946 m.

Explanation:

Resistance ;

is the resistivity of the wire, is the length of the wire and A is the cross section area of the wire.

The magnitude of resistivity of copper wire is 1.68×10⁻⁸Ωm.

The magnitude of resistivity of silver wire is 1.59×10⁻⁸Ωm.

The length of silver wire is 1.00 m

The resistance of the copper wire is

The resistance of the silver wire is

Given that,

,

 []

m

The length of the copper wire is 0.946 m.

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )