Enjoy! #FF-This hashtag mostly shows up on Fridays, which should give you a good indication of what one of the Fs means. The other stands for Follow, and the two combine to make the phrase Follow Friday.. Follow Friday is essentially a Twitter holiday with the aim of getting people to follow one another.
Technical. Original manufacturers part,390 Mhz frequency, 9-volt battery operated, part number 976LM a 977LM keypad is substituted per the manufacturers change, Color: Grey Works with all Liftmaster, Sears and Chamberlain garage door openers, utilizing the 390 Mhz frequency.echnical. Original manufacturers part,390 Mhz frequency, 9-volt battery operated, part number 976LM a 977LM keypad is substituted per the manufacturers change, Color: Grey Works with all Liftmaster, Sears and Chamberlain garage door openers, utilizing the 390 Mhz frequency.
OK. This gets into MRI and molecular physics. This is basic 2nd year university physics stuff (V cross B/Hall effect) For protons (hydrogen nuclei), the Larmor frequency is 42.58 MHz/Tesla. So a 3.0 Tesla MRI (127.74 MHz) is double the Larmor frequency of a 1.5 Tesla (85.16MHz) .his gets into MRI and molecular physics. This is basic 2nd year university physics stuff (V cross B/Hall effect) For protons (hydrogen nuclei), the Larmor frequency is 42.58 MHz/Tesla. So a 3.0 Tesla MRI (127.74 MHz) is double the Larmor frequency of a 1.5 Tesla (85.16MHz) .