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  2. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    This is a list of vacuum tubes or thermionic valves, and low-pressure gas-filled tubes, or discharge tubes.Before the advent of semiconductor devices, thousands of tube types were used in consumer electronics.

  3. Mashgiach - Wikipedia

    en.wikipedia.org/wiki/Mashgiach

    Various Kosher symbols on a package of Kosher meat A rabbi searching for scales on the skin of a swordfish in Tétouan, Morocco. A mashgiach (Hebrew: משגיח, lit. "supervisor"; pl. משגיחים ‎, mashgichim) or mashgicha (pl. mashgichot) is a Jew who supervises the kashrut status of a kosher establishment.

  4. Terefah - Wikipedia

    en.wikipedia.org/wiki/Terefah

    [1] [3] This prohibition should not be confused with a separate category of prohibition, called nevelah (a carcass), of eating of any kosher species of mammal or bird which died by any means other than shechita. [4] Thus, an animal could only be considered a terefah while alive; once it dies of its terefah wound it would be considered a nevelah.

  5. Prandtl number - Wikipedia

    en.wikipedia.org/wiki/Prandtl_number

    0.63 for oxygen [1] around 0.71 for air and many other gases; 1.38 for gaseous ammonia [1] between 4 and 5 for R-12 refrigerant; around 7.56 for water (At 18 °C) 13.4 and 7.2 for seawater (At 0 °C and 20 °C respectively) 50 for n-butanol [1] between 100 and 40,000 for engine oil; 1000 for glycerol [1] 10,000 for polymer melts [1] around 1 × ...

  6. 6L6 - Wikipedia

    en.wikipedia.org/wiki/6L6

    6.3: Heater current: 900 mA: Anode; Max dissipation Watts: 30: Max voltage: 500 Specification listed is for type 6L6-GC: Socket connections; The 6L6 Pinout, metal versions had the shell connected to pin 1. Pin 1 – n.c Pin 2 – Heater Pin 3 – Anode (Plate) Pin 4 – Grid 2 (Screen) Pin 5 – Grid 1 (control) Pin 6 – n.c Pin 7 – Heater

  7. Atomic form factor - Wikipedia

    en.wikipedia.org/wiki/Atomic_form_factor

    X-ray atomic form factors of oxygen (blue), chlorine (green), Cl − (magenta), and K + (red); smaller charge distributions have a wider form factor. In physics , the atomic form factor , or atomic scattering factor , is a measure of the scattering amplitude of a wave by an isolated atom.

  8. Ashkenazi Jewish cuisine - Wikipedia

    en.wikipedia.org/wiki/Ashkenazi_Jewish_cuisine

    With kosher meat not always available, fish became an important staple of the Jewish diet. ... (3:1), eggs, salt or pepper and vegetable oil. The fish skin and head ...

  9. Tablet-K - Wikipedia

    en.wikipedia.org/wiki/Tablet-K

    Tablet-K products are commonly available at Costco, often for dairy and fish products.Many cheeses produced by Cabot Creamery have a Tablet-K hechsher. [2] In 2006, Cabot Creamery expanded its line of kosher products, with some cheeses receiving a Tablet-K certification.