As a civilization, we do a lot of communication, in order to function. This communication takes place using a variety of technologies. Some of which are analog and some of which are digital. Analog signals are those where the information is conveyed by a continuously variable physical quantity. These are the kinds of signals that […]
Waves move energy through the Universe. As this energy moves, it often causes substances to vibrate or react in different ways. Especially when it comes into direct contact with an object or substance. We can predict how energy will interact with objects based on the type of wave it is. There are three main types […]
As long as your hearing is functioning properly you can hear things around you. What is sound? How does noise travel from an object where it is produced to your ears, so that you can hear it? Sound is a type of energy that travels through the air, or any other medium, as a vibration […]
Energy moves through the Universe all the time. It is transferred from one substance to another. What does the movement of energy look like? When energy moves through an object, it creates waves. These waves carry the energy through the object until they reach the end. There are two types of waves: mechanical and electromagnetic. […]
There are many substances in the Universe. Wood, metal, glass, dirt, flesh, and so forth. All of which are made of atoms. These substances often change forms through various processes known as physical and chemical changes. Physical changes are changes that happen to a substance without changing its chemical composition. For example, if you melt […]
You have probably held a magnet, and observed how they attract metal as well as other magnets. You may also have noticed that sometimes magnets are not attracted to each other, but instead repeal one another. Why do magnets behave this way? What is going on? Magnetism is a result of the motion and spin […]
Why does a balloon stick to the ceiling after you rub it on your head? The answer is static electricity. What is static electricity? Static electricity is that little zap you feel when you touch metal after walking across the carpet in your socks. How does it work? Electrons are miniscule particles, so tiny they […]
All matter exists in one of three phases or states. These phases are solid, liquid, or gas. A fourth state also exists, which is plasma, but in this article we will focus only on the first three, since they are far more common. Most of the matter in the Universe exists in a gas state. […]
Shinning a light through the darkness can certainly make things feel more safe. But what is light. What is it about light that causes it to shine? To understand this simple phenomenon, you need to know how the light works. Light is made up of waves that travel through space at 1 million meters per […]
In order to move through the Universe, all objects must use energy. Energy means the ability to do work. This is just a fancy way of saying that energy means that objects have the ability to move. When talking about energy, we often divide it into one of two categories. These categories are potential energy […]
