Radio Wave Power And How It Gets Reduced By Distance

Introduction Some people are very concerned that radio wave power coming from radio transmitters’ antennas will harm people. In particular people are troubled by mobile phone masts causing long term health problems when they are near to their homes. I just want to make it clear how much a transmitter’s power diminishes as it spreads… Continue reading Radio Wave Power And How It Gets Reduced By Distance

An Explanation of Direct And Inverse Proportion

Introduction At least one of my other posts How Distance Reduces The Power of Radio Waves (not yet published) requires an understanding of mathematical proportionality. In particular it requires an understanding of Inverse Proportion. So I have written this article to try and clarify it. It gives an explanation of the two types of proportion,… Continue reading An Explanation of Direct And Inverse Proportion

Magnetic Levitation Using A Superconductor

Levitating Magnet

Introduction Before demonstrating magnetic levitation this video shows a small magnet being cooled to a superconducting temperature using liquid nitrogen. Once cooled the superconducting magnet is shown levitating above a section of magnetic track as seen in the featured image. Further in the video the magnet is kept longer at superconducting temperatures by building a container of … Continue reading Magnetic Levitation Using A Superconductor

Spilling Juice From Cartons or ‘Tetra Paks®’

Introduction This post contains instructions on how to avoid spilling juice from cartons or Tetra Paks®, with a rectangular cross-section, while opening or lifting them. It’s quite natural to grip cartons by the easiest method (the broad sides) while opening them, or lifting them when they’re still full, causing the contents to pour or squirt out inadvertently. Cartons with a square cross section are indifferent… Continue reading Spilling Juice From Cartons or ‘Tetra Paks®’