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2. NEMA enclosure types - Wikipedia

   en.wikipedia.org/wiki/NEMA_enclosure_types

   X indicates additional corrosion protection; commonly used near salt water. 4 and 4X: Watertight. Must exclude at least 65 GPM of water from a 1-inch nozzle delivered from a distance not less than 10 feet for 5 min. Used outdoors on ship docks, in dairies, in wastewater treatment plants and breweries. X (as 4X) indicates additional corrosion ...

3. List of TCP and UDP port numbers - Wikipedia

   en.wikipedia.org/wiki/List_of_TCP_and_UDP_port...

   The port numbers in the range from 0 to 1023 (0 to 2 10 − 1) are the well-known ports or system ports. [3] They are used by system processes that provide widely used types of network services. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the ...

4. 5-4-3 rule - Wikipedia

   en.wikipedia.org/wiki/5-4-3_rule

   This rule is also designated the 5-4-3-2-1 rule with there being two link segments (without senders) and one collision domain. [ 3 ] An alternate configuration rule, known as the Ethernet way , allows 2 repeaters on the single network and does not allow any hosts on the connection between repeaters.

5. Alabama's College Football Playoff ranking illustrates ...

   www.aol.com/alabamas-college-football-playoff...

   He pointed to Alabama’s 3-1 record against teams currently in the top 25, which was the best of that group. He also pointed to the fact that Alabama is 6-1 against teams above .500 while Miami ...

6. Betti number - Wikipedia

   en.wikipedia.org/wiki/Betti_number

   This may be proved straightforwardly by mathematical induction on the number of edges. A new edge either increments the number of 1-cycles or decrements the number of connected components. Therefore, the "zero-th" Betti number b 0 (G) equals |C|, which is simply the number of connected components. [3] The first Betti number b 1 (G) equals |E ...

7. Previewing every college football conference championship ...

   www.aol.com/previewing-every-college-football...

   SEC: Texas (11-1) vs. Georgia (10-2) The rematch should be more competitive than Georgia’s 30-15 win in Austin earlier this year. While the Bulldogs struggled in an eight-overtime classic ...

8. Viewer's guide to the new College Football Playoff

   www.aol.com/sports/viewers-guide-college...

   After years of waiting for a bigger and better College Football Playoff, the moment has finally arrived.The bracket is set and the games are here. The inaugural 12-team field has a few surprises ...

9. 4-Phenyl-1,2,4-triazole-3,5-dione - Wikipedia

   en.wikipedia.org/wiki/4-Phenyl-1,2,4-triazole-3...

   4-Phenyl-1,2,4-triazoline-3,5-dione (PTAD) is an azodicarbonyl compound. PTAD is one of the strongest dienophiles and reacts rapidly with dienes in Diels-Alder reactions . [ 1 ] The most prominent use of PTAD was the first synthesis of prismane in 1973.