Robert Friedhoffer Books

Physics lab in a housewares store
Physics lab in a housewares store

By Robert Friedhoffer

Average: 0.00, 0 Ratings

Explores such topics in physics as levers, friction, heat transmission, and density with experiments using common household utensils.

Read More
Physics lab in a housewares store
Physics lab in a housewares store

By Robert Friedhoffer

Average: 0.00, 0 Ratings

Explores such topics in physics as levers, friction, heat transmission, and density with experiments using common household utensils.

Read More

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If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

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