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  2. Utility frequency - Wikipedia

    en.wikipedia.org/wiki/Utility_frequency

    The waveform of 230 V and 50 Hz compared with 120 V and 60 Hz. The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the nominal frequency of the oscillations of alternating current (AC) in a wide area synchronous grid transmitted from a power station to the end-user.

  3. Mains electricity by country - Wikipedia

    en.wikipedia.org/wiki/Mains_electricity_by_country

    Voltages in this article are the nominal single-phase supply voltages, or split-phase supply voltages. Three-phase and industrial loads may have other voltages. All voltages are root mean square (RMS) voltage; the peak AC voltage is greater by a factor of 2 {\displaystyle {\sqrt {2}}} , and the peak-to-peak voltage greater by a factor of 2 2 ...

  4. Mains hum - Wikipedia

    en.wikipedia.org/wiki/Mains_hum

    Mains hum, electric hum, cycle hum, or power line hum is a sound associated with alternating current which is twice the frequency of the mains electricity.The fundamental frequency of this sound is usually double that of fundamental 50/60 Hz, i.e., 100/120 Hz, depending on the local power-line frequency.

  5. These are the top 100 Black Friday deals, according to Walmart

    www.aol.com/lifestyle/these-are-the-top-100...

    Walmart is keeping track of its 100 most popular deals for Black Friday weekend, including TVs, AirPods, HP laptops, and more.

  6. Walmart’s Deals for Days: What to Comparison Shop As ... - AOL

    www.aol.com/walmart-deals-days-comparison-shop...

    Amazon Prime Day has become an online shopping tradition. This year, it takes place earlier than usual, on Monday, June 21 and Tuesday, June 22. The online retailer offers tons of amazing savings ...

  7. These are the 20 best Cyber Monday deals under $100 at Walmart

    www.aol.com/lifestyle/these-are-the-best-cyber...

    As you're shopping for the best Walmart Cyber Monday deals, here are some of the best we've found under $100, including a 22-piece cookware set from T-Fal that's less than $50 and $13 Wrangler ...

  8. Refresh rate - Wikipedia

    en.wikipedia.org/wiki/Refresh_rate

    Another difference between 50 Hz and 60 Hz standards is the way motion pictures (film sources as opposed to video camera sources) are transferred or presented. 35 mm film is typically shot at 24 frames per second (fps). For PAL 50 Hz this allows film sources to be easily transferred by accelerating the film by 4%.

  9. Electricity sector in Japan - Wikipedia

    en.wikipedia.org/wiki/Electricity_sector_in_Japan

    The electric power industry in Japan covers the generation, transmission, distribution, and sale of electric energy in Japan. Japan consumed approximately 918 terawatt-hours (TWh) of electricity in 2014. [1] Before the 2011 Fukushima Daiichi nuclear disaster, about a quarter of electricity in the country was generated by nuclear power. In the ...

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