Question

How to do this 1 plzz help!

Answer 1

Answer:

Not sure whether or not this is correct but here I go:

First is to find the length of one of the copper wire wrapping around the curved surface. To do this, we find the circumference of the circle on the cylinder:

$2\pi \left(5cm\right)=10\pi cm$

The diameter of the copper wire will represent a height on the cylinder. As you coil more and more copper wire about the cylinder, each copper wire will constitute more and more 'heights' until you don't have anymore space to coil around. To know how many copper wire you can coil around:

$\frac{1.2\cdot 100\cdot 10mm}{3mm}=400$ coils, each with length $10\pi cm$

∴ Total length =$400\cdot 10\pi cm=4000\pi cm$

∴ Total mass =$8.88g\:cm^{-1}\cdot 4000\pi cm=35520\pi g$

Hope this helps :)

Step-by-step explanation: