Microwaves

Microwaves are a type of Electromagnetic wave used in cellular telephones and satellite signals, and most commonly, in microwave ovens.
 * MICROWAVES**

The food is heated when microwaves interact with water molecules in food. Each water molecule is positively charged on one side while the other side is charged negatively. When you turn the microwave oven on, the vibrating electric field inside the microwave oven causes water molecules to rotate back and forth billions of times each second. Then, from the rotation, a type of friction between water molecules are form. Later, the thermal energy these molecules generates help the food to cook.

1. __http://phet.colorado.edu/simulations/sims.php?sim=Microwaves__ When you download the applet, you can first turn the microwave on to see how the wave cause the molecules to move. Then, you can change the frequency and the amplitude of the wave, making the electric charges to move back and forth more faster.
 * APPLETS**

2. __http://www.colorado.edu/physics/2000/index.pl__ If you go to this website, it will not directly take you to the microwave oven. As a result, if you look at the left, you will find Applet Thumbnails written in blue under Physics 2000. You may click that and scroll down until it says Microwave Ovens. Then, it is the first one that says "Cooking Marshmallows".

You can go to this website to see how the microwave helps the marshmallows to cook. You can put the marshmallows by clicking the tray and starting the oven. You can also learn that not all marshmallows cook at the same time.

The first applet is made by the the PhET Interactive Simulations. This site is organized the University of Colorado. This people make simulations to improve the way that physics, chemistry, biology, earth science and math are taught and learned. This simulations helps the students to make connections between real life phenomena, and understand them easily. If you would like to know more about them go to the site below. __http://phet.colorado.edu/about/index.php__
 * CREATORS**

The second applet is made by the University of Colorado. It is a university of the state of Colorado. If you want to learn more about the university, go to the site below. __http://www.colorado.edu/about/__

by Me :)