A mixture of $100\text{ g}$ contains $35\text{ g}$ of iron filings, $25\text{ g}$ of nickel powder, and…
A mixture of $100\text{ g}$ contains $35\text{ g}$ of iron filings, $25\text{ g}$ of nickel powder, and $40\text{ g}$ of sand. If a strong magnet is brought near the mixture, what total mass of material will stick to the magnet?
$35\text{ g}$
$60\text{ g}$
$75\text{ g}$
$100\text{ g}$
Solution
Both iron filings ($35\text{ g}$) and nickel powder ($25\text{ g}$) are magnetic materials and will be attracted, giving $35 + 25 = 60\text{ g}$. Sand is non-magnetic.