The terms weight and mass are often used incorrectly. Phrases like ‘a bag of sugar weighs 1 kg’ are not scientifically correct. This means that a 1 kg mass would be attracted to Earth by a force of 10 ...

You're about to find out how to weigh a floating object without scales, which is also an excuse to splash around a bit and make some mess. And here's everything you'll need; a measuring jug, an ...