#schoolfreeware

My source code of tutorial 10, Part 1 ...

The output of my source code ...

My source code of tutorial 10, Part 2 ...

SchoolFreeware Science Video 9 – Collapse A Container With Air Pressure

What we need is an empty plastic container like a soda bottle or water bottle, a bowl of hot tap water and a bowl of ice water. A thermometer is optional. The ice water is about 37 degrees F. The hot tap water is at 114 degrees F. Make sure that the hot water is not scalding hot. The water should be 120 F or cooler.

Air expands when heated and contracts when cooled. We can heat the air, in the…

SchoolFreeware Science Video 1 – Introduction And Simple Chemical Reaction – Endothermic Reaction

This series is designed to show some fun and simple science experiments and demonstrations that can be done in the classroom and at home for little cost.

As many know, some of the catalogs and sites that offer educational science kits and supplies charge sky high prices. Many of the items can be found elsewhere for a much cheaper price.

This is not to knock all catalogs and kits. Many catalogs…

SchoolFreeware Science Video 14 – Can A Hair Dryer Melt Metal?

Here is the explanation of what is happening. The hair dryer is an ordinary unmodified hair dryer ( 1875 watts). It can be bought at any department store. The metal is gallium. Gallium is an element. It can be bought for as little as 50 cents a gram. Gallium has a melting point of about 85.6 degrees Fahrenheit. ( 29.8 Celsius ). The hot air coming from the dryer is more than necessary to melt the…