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  2. 99% Invisible - Wikipedia

    en.wikipedia.org/wiki/99%_Invisible

    99% Invisible has produced a variety of episodes in collaboration with other producers and radio shows. "The Political Stage", episode 63, was a collaboration with Andrea Seabrook and DecodeDC that focused on the production of campaign trail events. [ 29 ]

  3. Energy conversion efficiency - Wikipedia

    en.wikipedia.org/wiki/Energy_conversion_efficiency

    Energy conversion efficiency depends on the usefulness of the output. All or part of the heat produced from burning a fuel may become rejected waste heat if, for example, work is the desired output from a thermodynamic cycle.

  4. 100% renewable energy - Wikipedia

    en.wikipedia.org/wiki/100%_renewable_energy

    99% renewable electricity is the main energy used in Quebec (41%), followed by oil (38%) and natural gas (10%) [95] Samsø, Denmark: 3,806 Net greater than 100% wind power and biomass, connected to mainland for balance and backup power [96] [97] Scotland: 5,510,000 (2022)

  5. Octane rating - Wikipedia

    en.wikipedia.org/wiki/Octane_rating

    An octane rating, or octane number, is a standard measure of a fuel's ability to withstand compression in an internal combustion engine without causing engine knocking.The higher the octane number, the more compression the fuel can withstand before detonating.

  6. HEPA - Wikipedia

    en.wikipedia.org/wiki/HEPA

    Common standards require that a HEPA air filter must remove—from the air that passes through—at least 99.95% (ISO, European Standard) [4] [5] or 99.97% (ASME, U.S. DOE) [6] [7] of particles whose diameter is equal to 0.3 μm, with the filtration efficiency increasing for particle diameters both less than and greater than 0.3 μm. [8]

  7. 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.

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