So it's time to buy some new wheels. What hardness should you get? What do the durometer numbers mean? What's a durometer anyway? Don't worry, we got you. All skateboard wheels are made from urethane, ...

Discover how to identify and treat annoying hard water issues in your home. Many homes suffer from hard water due to a high ...

I know it's part of getting older, but when my husband was told to go to the ER because a clinical trial EKG had revealed an irregular heartbeat, I was startled almost into one of my own.

Today, most people admire diamonds for two exceptional attributes: their hardness and their brilliance. Scholars knew of diamonds' unrivaled hardness since antiquity, but its unique optical ...

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Put a known volume of water into a boiling tube. Add soap solution, one drop at a time, and shake the mixture for 10 seconds. Record the number of drops of soap needed to make a lather. The ...

Hardness testing machines perform three common kinds of scientific hardness tests: the Brinell hardness test, the Rockwell hardness test, and the Vickers hardness test. The Rockwell hardness test is ...