# What is the density of a coin composed of zinc and copper?

Jan 4, 2016

From the information you've given here, you can't use these data to determine the physical composition of the pennies.

#### Explanation:

We might like to think that the alloy's density is the weighted average of the individual densities. This might even be true. However, you haven't given us the density of the coinage; this will be different than the individual densities. Given that we have no handle on the alloy composition, the answer to your question is NO.

Was that worth a wait of 5 hours? We didn't earn our money today.

Jan 4, 2016

Where I got the information from the internet (radius, height and mass) and $\delta$ is the density.