Ahh….no, despite the contents of this ludicrous article. There is no energy in gravity. Gravity is a force that is a function of the mass of two objects, say a brick and the Earth. Force and energy are not the …
Tag: potential energy
Video on CleanTech
Here’s a video that presents four different cleantech concepts, with an interesting mix of validity. The first, covering city streets with a reflective white coating, is completely valid, as it causes a significant percentage of the incoming solar radiation to …
LED Product Is Great, But Let’s Understand the Science
Here’s a fantastic product that is quickly replacing the kerosene lamps that denizens of third-world countries are using for reading lights. It’s an LED lamp that’s powered the same way as a grandfather clock, i.e., with the chemical energy in the …
LED Product Is Great, But Let’s Understand the Science Read More »
Follow-up Discussion on Thermodynamics
Here’s the follow-up to my discussion with friends who claim to have observed a violation of the 2nd law of thermodynamics. Of course, I get claims like this at the rate of at least once a week, and I pay …
