Thursday, October 31, 2013
We're positive that you'll have a good time learning about negative charges.
Friday, April 8, 2011
If you replaced one incandescent light bulb with a CFL, you would save enough energy to watch TV for 429 hours, watch 215 DVDs or play a video game for 201 hours. If 1000 people joined you, you could power a roller coaster for 34 days, power a shopping mall for 31 days or power Alaska for...