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2. Lifting gas - Wikipedia

   en.wikipedia.org/wiki/Lifting_gas

   A lifting gas or lighter-than-air gas is a gas that has a density lower than normal atmospheric gases and rises above them as a result, making it useful in lifting lighter-than-air aircraft. Only certain lighter than air gases are suitable as lifting gases. Dry air has a density of about 1.29 g/L (gram per liter) at standard conditions for ...

3. Energy efficiency in transport - Wikipedia

   en.wikipedia.org/wiki/Energy_efficiency_in_transport

   Because of their light weight and small motors, they are extremely energy-efficient with a typical energy efficiency of 1.1 kWh (4.0 MJ) per 100 km [56] (1904 MPGe 810 km/L 0.124 L/100 km), even more efficient than bicycles and walking. However, as they must be recharged frequently, they are often collected overnight with motor vehicles ...

4. Kitchen stove - Wikipedia

   en.wikipedia.org/wiki/Kitchen_stove

   Kitchen stove. A kitchen stove, often called simply a stove or a cooker, is a kitchen appliance designed for the purpose of cooking food. Kitchen stoves rely on the application of direct heat for the cooking process and may also contain an oven, used for baking. "Cookstoves" (also called "cooking stoves" or "wood stoves") are heated by burning ...

5. We compared gas vs. electric stoves in our L.A. test kitchen ...

   www.aol.com/news/gas-stoves-phase-tested-flame...

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6. Electric stove - Wikipedia

   en.wikipedia.org/wiki/Electric_stove

   An electric stove, electric cooker or electric range is a stove with an integrated electrical heating device to cook and bake. Electric stoves became popular as replacements for solid-fuel (wood or coal) stoves which required more labor to operate and maintain. Some modern stoves come in a unit with built-in extractor hoods.

7. History of manufactured fuel gases - Wikipedia

   en.wikipedia.org/wiki/History_of_manufactured...

   Drawing the retorts at the Great Gas Establishment Brick Lane, from The Monthly Magazine (1821). The history of gaseous fuel, important for lighting, heating, and cooking purposes throughout most of the 19th century and the first half of the 20th century, began with the development of analytical and pneumatic chemistry in the 18th century.

8. Stove - Wikipedia

   en.wikipedia.org/wiki/Stove

   A stove or range is a device that generates heat inside or on top of the device, for local heating or cooking. Stoves can be powered with many fuels, such as electricity, natural gas, gasoline, wood, and coal. Due to concerns about air pollution, efforts have been made to improve stove design. [1] Pellet stoves are a type of clean-burning stove ...

9. Energy conversion efficiency - Wikipedia

   en.wikipedia.org/wiki/Energy_conversion_efficiency

   Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms. The input, as well as the useful output may be chemical, electric power, mechanical work, light (radiation), or heat. The resulting value, η (eta), ranges between 0 and 1. [1][2][3]