tell me what i can make for my physics project?

Question

it should be something abt energy or communication.........working models plzzz let me know how it works and how its made

Answer 1

Use a lemon to make a voltaic battery and even power a digital watch.
http://www.energyquest.ca.gov/projects/lemon.html

Making Solar Cooking Devices
http://solarcooking.org/plans.htm

high school science project for building a fuel cell
http://www.fuelcells.org/ced/career/scienceproject.pdf

Make a model of a power plant that uses steam.
http://www.energyquest.ca.gov/projects/geothermal-pp.html

Answer 2

You could calculate the speed of light using your microwave and some cheese.

(I'm not kidding) If you google http://www.google.com/search?num=100&hs=Are&hl=en&lr=lang_en&safe=off&client=opera&rls=en&q=microwave+chocolate+speed+of+light&btnG=Search the second entry from the top will give you all you need to know about how to do it. Just clicked on the "cached" link as it's cycled off the main page and is difficult to find.