You need to produce a set of cylindrical copper wire 3.5 m long that will have a resistance of 0.125 Ω each. What will be the mass of each of these wires?

(ρ = 1.72X10-8 Ωm, density of copper = 8.9X103 kg/m3)​

Solution :

We know, resistance is given by :

Now, we know mass of wire is given by :

Hence, this is the required solution.

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.