Question

If 5m of copper wire weighs 3.15g. How much does 0.85m of copper wire weigh and what is its density?

Answer 1

0.536 g

Explanation:

I'm considering that the diameter of the copper wire and density of copper in both cases are the same.

So, using the unitary method,

`color(white)(xx)5` m of copper wire weighs `3.15` g

`rArr1` m of copper wire weighs `rarr` `3.15/5` g

`rArr 0.85` m of copper wire weighs `rarr` `3.15/5 * 0.85` g

`color(white)(xxxxxxxxxxxxxxxxxxxxxxxxx) = 0.536` g

We don't have enough information to calculate the density of the wire.