Robert Friedhoffer Books

Science Lab in a Supermarket
Physics Lab in a Hardware Store Physical Science Labs
Physics Lab in a Housewares Store Physical Science Labs
How to Haunt a House for Halloween
Everything you need for Simple Science Fair Projects
The magic show
The magic show

By Robert Friedhoffer

Average: 0.00, 0 Ratings

Read More
Scientific American Simple Science Fair Projects Grades 3 5
More Magic Tricks Science Facts
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
Everything you need for Winning Science Fair Projects

Related Articles from our Blog

How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

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.

Read More