B+Microwave+Oven

=Isotope and Radioactivity = = = =Microwave Oven = = = = = =Explanation of interesting facts: (how used/works.experiments/discoveries) =  =3 Advantages of using the radioactive isotope/radiation/benefits of discovery =  1. Heats food, but does not become hot itself like regular ovens and stove tops.
 * 1) Cooks or heats food by dielectric heating
 * 2) Uses microwave radiation to heat water and other polarized molecules in food
 * 3) Discovered by accident by Percy Spencer when his chocolate bar melted from the radar that he was making, later he created the microwave oven
 * 4) Not used for baking or browning food like a conventional oven
 * 5) Popcorn was the first thing made in a microwave oven, and then an egg, which exploded in the face of an experimenter

2. Does not heat the cookware, so there is a less chance of serious burns that can be caused by conventional stoves and ovens.

3. Because of the lower cooking temperature, the chance of tar and char (substances that are directly involved in the increase of cancer) formation is eliminated.

=3 Disadvantages of using the radioactive isotope/radiation/discovery: =  1. If products are heated too long they may catch fire or explode due to an increase in the pressure of steam.

2. The magnetron tube itself can cause problems as it will cook itself and burn out if there is no object placed in the microwave oven.

3. Electric sparks can be created if an object with pointed metal (ex. a fork) is placed in the microwave oven. When the dielectric breakdown occurs in air, a few nitrogen oxides and ozone oxides form which are not healthy in large quantities.

=Is the radioactive isotope/radiation/discovery still used today? Explain =  Microwave oven are still used today because they are a quick and easy way to heat food. Now a days there are more sizes and variations of these little ovens and that about 90% of households have one.

=References = <span style="font-family: 'Comic Sans MS',cursive;"> http://en.wikipedia.org/wiki/Microwave_oven#Benefits_and_safety_features http://www.thetechland.com/wp-content/uploads/2009/Inventions/Microwave-oven.jpg http://www.find-electricalgoods.co.uk/productimages/111/Panasonic/NN-E225MBBPQ.jpg

=<span style="color: #800080; font-family: 'Comic Sans MS',cursive;">Diagram/image = <span style="font-family: 'Comic Sans MS',cursive;">