It’s a common situation faced by every hard-working American – you get home after a long day at the calcium mines, and find yourself stuck with a pile of colored golf balls that simply aren’t going to ...

Introduction Have you ever used a coin-sorting machine to separate pennies, nickels, dimes and quarters? When you need to separate things that are all mixed together, using a machine can be much ...

Introduction Does your community have single-stream recycling, which allows you to mix materials into one recycling container? Have you ever wondered how those materials all get separated so they can ...