Blogs

How to make instant snow from boiling water - if you see the trick, it is amazing

One winter I was in the airport in Minneapolis, Minnesota getting ready to fly home. I had arrived there on a flight from Rochester, Minnesota in the afternoon. As the sun set, however, there was a problem - it got so cold they closed the airport. It ...

The world's easiest-to-build potato cannon (spud gun) - now combustion free!

This is a classic HowStuffWorks article that describes the construction and operation of the traditional potato cannon:How Spud Guns WorkThe traditional potato cannon is a combustion device - it uses hairspray as its fuel and the spark unit from an T ...

Why use a humidifier in your home - The advantages of humidifiers in the winter

We have a home humidifier sitting in the living room of the Brain household. It happens to be the older version of This morning is a typical winter morning (at least this year) in North Carolina. It is bright, clear, 23 degrees F outside and very dry ...

We see insulation all around us. Most mammals are covered in fur, which is one of nature's forms of insulation (blubber is another). When you go outside on a cold winter day, you put on a coat, which is fashionable insulation. As a general rule, the ...

You Asked:How does a helicopter move forward? --- E. K., Mechanicsville, Va.Marshall Brain Answers:The basic idea that lets a helicopter hover in the air is easy to understand. Basically you take a pair of For this to work you need to add one thing. ...

The economy is tough right now. What if you want to start over, sort of like the homesteaders of the 1800s? You stake your claim to free land and create your life from scratch.It can be done today in two different ways. This article points out that t ...

You Asked:How do coal-fired power plant scrubbers work? --- Gil, Onancock, Va.Marshall Brain Answers:If coal were pure carbon, then the only thing we would have to worry about at coal-fired power plants is the carbon dioxide formed when coal burns. U ...

You Asked: How does a hydrogen generator work? --- Sepideh, Tehran, Iran Marshall Brain Answers...

You Asked: When I let a balloon go, how high can it go? --- Timothy, York, Pa. Marshall Brain Answers...

When thinking about the ancient city of Rome, and Roman engineering, one thing that is amazing even today is the aqueduct system they used to bring water into the city. Water might travel hundreds of miles through canals and tunnels to reach the city ...