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2. Power inverter - Wikipedia

   en.wikipedia.org/wiki/Power_inverter

   Utility frequency conversion - if a user in (say) a 50 Hz country needs a 60 Hz supply to power equipment that is frequency-specific, such as a small motor or some electronics, it is possible to convert the frequency by running an inverter with a 60 Hz output from a DC source such as a 12V power supply running from the 50 Hz mains.

3. Electric power conversion - Wikipedia

   en.wikipedia.org/wiki/Electric_power_conversion

   Aircraft often use 400 Hz power internally, so 50 Hz or 60 Hz to 400 Hz frequency conversion is needed for use in the ground power unit used to power the airplane while it is on the ground. Conversely, internal 400 Hz internal power may be converted to 50 Hz or 60 Hz for convenience power outlets available to passengers during flight.

4. Dilution refrigerator - Wikipedia

   en.wikipedia.org/wiki/Dilution_refrigerator

   In the classic dilution refrigerator (known as a wet dilution refrigerator), the 3 He is precooled and purified by liquid nitrogen at 77 K and a 4 He bath at 4.2 K. Next, the 3 He enters a vacuum chamber where it is further cooled to a temperature of 1.2–1.5 K by the 1 K bath , a vacuum-pumped 4 He bath (as decreasing the pressure of the ...

5. TikTok hires ex-Trump administration lawyer ahead of Supreme ...

   www.aol.com/news/tiktok-hires-ex-trump...

   TikTok and its Chinese owner ByteDance have turned to a veteran U.S. Supreme Court lawyer as they prepare to ask the justices to block a law that could ban the popular short video platform in the ...

6. President Biden faces backlash from Democrats for breaking ...

   www.aol.com/president-biden-faces-backlash...

   President Joe Biden and his son Hunter Biden hug on stage at the conclusion of the first day of the Democratic National Convention (DNC) at the United Center in Chicago, Illinois, on August 19, 2024.

7. Why top internet sleuths say they won't help find the ... - AOL

   www.aol.com/why-top-internet-sleuths-wont...

   A high-profile violent crime typically sets social media abuzz with tips and theories from amateur internet sleuths, hunting for the alleged perpetrator. But after UnitedHealthcare CEO Brian ...