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2. List of 99% Invisible episodes - Wikipedia

   en.wikipedia.org/wiki/List_of_99%_Invisible_episodes

   99% Invisible. episodes. This is a list of 99% Invisible podcast episodes, hosted by Roman Mars. From its inception in 2010 until April 2021, 99% Invisible was produced and distributed by Radiotopia. In April 2021, the company that produces the show (99% Invisible Inc.) was acquired by SiriusXM, with 99% Invisible moving to the Stitcher Radio ...

3. Brazing - Wikipedia

   en.wikipedia.org/wiki/Brazing

   Brazing is a metal -joining process in which two or more metal items are joined by melting and flowing a filler metal into the joint, with the filler metal having a lower melting point than the adjoining metal. Brazing differs from welding in that it does not involve melting the work pieces. Brazing differs from soldering through the use of a ...

4. Thermal efficiency - Wikipedia

   en.wikipedia.org/wiki/Thermal_efficiency

   In thermodynamics, the thermal efficiency ( ) is a dimensionless performance measure of a device that uses thermal energy, such as an internal combustion engine, steam turbine, steam engine, boiler, furnace, refrigerator, ACs etc. For a heat engine, thermal efficiency is the ratio of the net work output to the heat input; in the case of a heat ...

5. Energy in Iceland - Wikipedia

   en.wikipedia.org/wiki/Energy_in_Iceland

   Iceland is a world leader in renewable energy. 100% of the electricity in Iceland's electricity grid is produced from renewable resources. [1] In terms of total energy supply, 85% of the total primary energy supply in Iceland is derived from domestically produced renewable energy sources. Geothermal energy provided about 65% of primary energy ...

6. Greenhouse gas - Wikipedia

   en.wikipedia.org/wiki/Greenhouse_gas

   This is an accepted version of this page This is the latest accepted revision, reviewed on 9 October 2024. Gas in an atmosphere with certain absorption characteristics This article is about the physical properties of greenhouse gases. For how human activities are adding to greenhouse gases, see Greenhouse gas emissions. Greenhouse gases trap some of the heat that results when sunlight heats ...

7. Fuel efficiency - Wikipedia

   en.wikipedia.org/wiki/Fuel_efficiency

   e. Fuel efficiency(or fuel economy) is a form of thermal efficiency, meaning the ratioof effort to result of a process that converts chemicalpotential energycontained in a carrier (fuel) into kinetic energy or work. Overall fuel efficiency may vary per device, which in turn may vary per application, and this spectrum of variance is often ...