Mass is a tricky concept. We all think we know what it is: it's what you measure when you put something on weighing scales or a digital balance. Alternatively, you could say mass is the property of an object that resists changes to its movement. In other words, an object with lots of mass is … Continue reading What is mass?
Six Impossible Things
Most of the physics you learn at school hasn't changed for hundreds of years. It is important stuff because we know that it works and it underpins a lot of the modern world. But that doesn't mean it is right. This is the point that is made in John Gribbin's new book, Six Impossible Things. … Continue reading Six Impossible Things
Mr Tarrant's physbang 'blog 