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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. 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 ...

  4. Cost of electricity by source - Wikipedia

    en.wikipedia.org/wiki/Cost_of_electricity_by_source

    The levelized cost of electricity (LCOE) is a metric that attempts to compare the costs of different methods of electricity generation consistently. Though LCOE is often presented as the minimum constant price at which electricity must be sold to break even over the lifetime of the project, such a cost analysis requires assumptions about the value of various non-financial costs (environmental ...

  5. Gas stove - Wikipedia

    en.wikipedia.org/wiki/Gas_stove

    A gas stoveis a stovethat is fuelled by combustible gas such as natural gas, propane, butane, liquefied petroleum gas, syngas, or other flammablegas. Before the advent of gas, cooking stoves relied on solid fuelssuch as coal or wood. The first gas stoves were developed in the 1820s and a gas stove factory was established in England in 1836.

  6. 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 ...

  7. 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 ...

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