Imagine a satellite, floating in space. How would you measure its voltage? Yes, it probably has a non-zero voltage, a consequence of geospatial electric fields and ion and electron currents. The ...

You can measure objects on an iPhone using Apple's Measure app. The app is free and works with specific versions of the iPhone, iPad, and iPod. You may be able to ...

With the introduction of ARKit in iOS 11, Apple put a stake in the ground in the mobile Augmented Reality race. Some of the best early AR apps used your phone to measure linear distances—a digital ...

Recently in my physics lab, students were having trouble with the difference between mass and weight. I had ready answers---it’s a topic I’ve gone over hundreds of times. But after I explained that ...