The raw material used to make carbon fiber is called the precursor. 90% of the carbon fibers produced are made from polyacrylonitrile. The remaining 10% is made from rayon or petroleum pitch. All of these materials are organicpolymers. The characterization of organic polymers is formed by a lo...
If the last eruption occurred before historic times but within 10,000 years, the volcano was considered "dormant" because it likely had the potential to erupt again. Volcanoes that had not erupted in more than 10,000 years were considered extinct, because it seemed unlikely they would erupt ...
Getting just the right amount of heat and solder onto your project can be challenging, especially if you're using a solder that needs a lot of heat like some of the lead-free ones. Then there's the wetting and the fluxes and the danger that you haven't formed a strong enough bond ...
Burning fossil fuels for the purpose of electricity production leads to the release of carbon dioxide and other greenhouse gasses. It also causes local air pollution and huge waste on another level. This waste heat is known to be the byproduct of energy generation, which is a part of the th...
dead, damaged, or diseased branches and maintain the shape of the tree. Prune pine trees in the late winter or early spring before new growth begins. When pruning, use clean and sharp tools to avoid injuring the tree; shaping pine trees when young can help them grow into well-formed ...
any more than the growth of these industries in the 20th century was an accident. In order to reach this future, we need to understand, research, invest in, and build it. Every joule of electricity that comes from fossil fuels means paying for what’s burned to produce it. In fact, be...
That was another theory the scientists tested. But when they examined a tank that geckos had been climbing around in, they found no evidence of any sticky stuff. Could static electricity explain it? Electricity can certainly stick things together. If you rub a balloon on a woolen jumper, the...
The European nation’s energy revolution has made it a leader in replacing nukes and fossil fuels with wind and solar technology.
The best of National Geographic delivered to your inbox Sign up for more inspiring photos, stories, and special offers from National Geographic. Sign Up
An example of science in the media is the case of enhanced global warming as a result of increased levels of carbon dioxide in the atmosphere due to the combustion of fossil fuels. It is not difficult to find widely different predictions in the media about the likely environmental impact of ...