Tag: potential energy

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  …

Renewable Energy from Gravity? Read More »

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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 …

Video on CleanTech Read More »

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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 »

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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 …

Follow-up Discussion on Thermodynamics Read More »

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