FeaturesAugust 3, 2017
Hooked on Science: Magnetic money
n Neodymium magnet n United States $1 bill n STEP 1: Hold the dollar bill so it hangs freely from your fingers. What effect will the neodymium magnet have on the dollar? n STEP 2: Look for a location on the dollar bill, which has a lot of ink, bring the magnet close to the dollar, and observe. What happens? Apply what you know to design a way to help a cashier determine whether money is counterfeit...
Materials
- Neodymium magnet
- United States $1 bill
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Instructions
- STEP 1: Hold the dollar bill so it hangs freely from your fingers. What effect will the neodymium magnet have on the dollar?
- STEP 2: Look for a location on the dollar bill, which has a lot of ink, bring the magnet close to the dollar, and observe. What happens? Apply what you know to design a way to help a cashier determine whether money is counterfeit.
Explanation
To prevent counterfeiting, dollar bills in the United States are printed with magnetic ink, which causes the dollar bill to attract to the neodymium magnet.
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