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  2. In most people, Viagra works within 1 hour after it’s taken. It’s possible that Viagra can begin working within 30 minutes of being taken. But other times, it may take up to 4 hours to start ...

  3. Ruble sign - Wikipedia

    en.wikipedia.org/wiki/Ruble_sign

    Ruble sign. The ruble sign, ₽, is the currency sign used for the Russian ruble, the official currency of Russia. Its form is a Cyrillic letter Р with an additional horizontal stroke. [a] The design was approved on 11 December 2013 after a public poll that took place a month earlier. [1]

  4. What Causes Hypercalcemia? Here Are 7 Known Causes - WebMD

    www.webmd.com/a-to-z-guides/hypercalcemia-causes

    Lung cancer. Kidney cancer. Breast cancer. Multiple myeloma (a blood cancer that starts in the bone marrow) Your cancer or the treatment you get for it can share symptoms with hypercalcemia, such ...

  5. Number sign - Wikipedia

    en.wikipedia.org/wiki/Number_sign

    The symbol # is known variously in English-speaking regions as the number sign, hash, or pound sign. The symbol has historically been used for a wide range of purposes including the designation of an ordinal number and as a ligatured abbreviation for pounds avoirdupois – having been derived from the now-rare ℔ .

  6. WhatsApp - Wikipedia

    en.wikipedia.org/wiki/WhatsApp

    WhatsApp (officially WhatsApp Messenger) is an instant messaging (IM) and voice-over-IP (VoIP) service owned by technology conglomerate Meta. [14] It allows users to send text, voice messages and video messages, [15] make voice and video calls, and share images, documents, user locations, and other content.

  7. Why Is My Poop Black? 7 Causes of Black or Tarry Stool - WebMD

    www.webmd.com/digestive-disorders/black-tarry...

    A bleeding ulcer is the most common concerning cause of dark stools. An ulcer is an open sore on the inside of your stomach or small intestine. Sometimes these sores bleed. This can make your poop ...

  8. Sign In Please - Wikipedia

    en.wikipedia.org/wiki/Sign_In_Please

    Professional ratings. Sign In Please is the debut studio album by American rock band Autograph, released on September 27, 1984, by RCA Records. The album features the band's only hit and signature song, "Turn Up the Radio". [3] [4] [5] "Turn Up the Radio" was featured in a variety of media in coming years and is regarded as an '80s glam metal ...

  9. Null sign - Wikipedia

    en.wikipedia.org/wiki/Null_sign

    In mathematics, the null sign (∅) denotes the empty set. Note that a null set is not necessarily an empty set. Common notations for the empty set include " {}", "∅", and " ". The latter two symbols were introduced by the Bourbaki group (specifically André Weil) in 1939, inspired by the letter Ø in the Danish and Norwegian alphabets (and ...