Could a perpetual motion machine be possible? No, because any perpetual motion machine would break the laws of thermodynamics. The definition of a machine is a device used to perform a task. Any perpetual motion machine has to be able to perform work to be a machine. There are a lot of people that say […]
#1275 Could a perpetual motion machine be possible? Read More »
Does the ozone layer still have a hole? Yes, the ozone layer does still have a hole, although it is slowly repairing itself. The ozone layer is not very thick, but it is vital to our survival on this planet. We talk about a hole in the ozone layer, but it is not an impenetrable
#1274 Does the ozone layer still have a hole? Read More »
What is Prince Rupert’s drop? Prince Rupert’s drop is a small, tadpole-shaped glass bead that is incredibly strong but incredibly fragile. Prince Rupert’s drops have been around for a long time and there is some thought that they were first discovered by Roman glassmakers two thousand years ago. They were first brought to Great Britain
#1219 What is Prince Rupert’s drop? Read More »
Why are some materials brittle? Materials such as glass and ceramics are brittle because their atoms are held together by strong bonds that cannot slide past each other. If you have ever dropped a jar of something on a hard floor, you will know that glass is very brittle and shatters when impacted. Or, if
#1211 Why are some materials brittle? Read More »
How does a self-cleaning surface work? There are two basic ways to make something self-cleaning. You can make it superhydrophobic or superhydrophilic. Both of these methods will use water to clean the object. Self-cleaning surfaces are very useful for places that are difficult to get to and manually clean, such as the windows on the
#1182 How does a self-cleaning surface work? Read More »
Does the placebo effect work? The placebo effect works for things that are directly affected by the brain, but not for actual illnesses. Nobody understands exactly the mechanism behind the placebo effect, but there are some pretty good theories. The word “placebo” comes from Latin, and its origins give a clue to what it does.
#1161 Does the placebo effect work? Read More »
Why does an oxyacetylene torch get so hot? An oxyacetylene torch gets so hot because the particles in acetylene hold an enormous amount of energy that they release when they are exposed to oxygen. Most of us will never have used an oxyacetylene torch. They are used by metal workers to weld or to cut
#1145 Why does an oxyacetylene torch get so hot? Read More »
How can we 3D print organs? Organs can be 3D printed using an ink made of the patient’s own cells that are laid on a scaffold. One of the problems we have as humans is that our organs sometimes fail. There are many reasons for this, from disease to accidents. Some organs we can live
#1138 How can we 3D print organs? Read More »
Why do rechargeable batteries lose power as they age? Because the process of recharging a battery is not 100% efficient and because of chemical degradation. These days, the majority of us use rechargeable batteries every day. While writing this, I have four devices currently recharging. I am sure you have something similar while you are
#1132 Why do rechargeable batteries lose power as they age? Read More »
Why does soap produce foam? All foaming soaps contain chemicals that are called foaming agents. As their name implies, their job is to make a foam when you add water and air to the soap. The main chemicals that you find in soap are ammonium lauryl sulfate and sodium dodecyl sulfate. Both of these are
#1120 Why does soap produce foam? Read More »
