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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. Catalytic heater - Wikipedia

   en.wikipedia.org/wiki/Catalytic_heater

   A catalytic heater is a flameless heater which relies on catalyzed chemical reactions to break down molecules and produce calefaction (heat). [1] When the catalyst, fuel (e.g., natural gas), and oxygen combine together, they react at a low enough temperature that a flame is not produced. This process keeps repeating itself until either oxygen ...

5. 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 ...

6. 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.

7. 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 ...