Tau
Tau (uppercase Τ, lowercase τ; Greek: ταυ [taf]) is the 19th letter of the Greek alphabet. In the system of Greek numerals it has a value of 300.
The name in English is pronounced /taʊ/ or /tɔː/, but in modern Greek it is [taf]. This is because the pronunciation of the combination of Greek letters αυ has changed from ancient to modern times from one of [au] to either [av] or [af], depending on what follows (see Greek orthography).
Tau was derived from the Phoenician letter taw 
(𐤕). Letters that arose from tau include Roman T and Cyrillic Te (Т, т).
The letter occupies the Unicode slots U+03C4 (lowercase) and U+03A4 (uppercase). In HTML, they can be produced with named entities (τ and Τ), decimal references (τ and Τ), or hexadecimal references (τ and Τ).
Modern usage
The lower-case letter τ is used as a symbol for:
Biology
Tauá
Tauá is a municipality in the state of Ceará in the Northeast region of Brazil. In 2010 it had a total population of 55,755 people. It is one of the largest municipalities in the state, with an area of 4,018.188 square kilometres (1,551.431 sq mi).
History
The toponymy of Tauá refers to an indigenous word meaning "yellow clay and loam" in the Tupi language. Its origins date from at least the early 18th century. On December 14, 1801, Ouvidor Gregório José da Silva went to the small settlement of Tauá to raise the site to a town. On May 3, 1802, it became a formal settlement. On August 17, 1832, it was given freguesia status. On December 2, 1889, the site was renamed São João do Príncipe dos Inhamuns. It received the classification of city on August 2, 1929, returning to its former name.
Geography
The city is located 337 kilometres (209 mi) away from the capital of Ceará State, Fortaleza. The town lies along BR-020, 60.8 kilometres (37.8 mi) by road northeast of Parambu. Districts of the municipality include Marrecas, Barra Nova, Trici, Marruás, Carrapateiras, Inhamuns, and Santa Tereza. The Jaguaribe River's headwaters are located in the Tauá districts of Trici and Carrapateiras. At Tauá, the Jaguaribe is rather narrow, 50–100 metres (160–330 ft) in width, and is sandy. The course of the river between Tauá to the mouth of the Salgado River is approximately 250 kilometres (160 mi).
Tau (particle)
The tau (τ), also called the tau lepton, tau particle, or tauon, is an elementary particle similar to the electron, with negative electric charge and a spin of 1⁄2. Together with the electron, the muon, and the three neutrinos, it is a lepton. Like all elementary particles with half-integral spin, the tau has a corresponding antiparticle of opposite charge but equal mass and spin, which in the tau's case is the antitau (also called the positive tau). Tau particles are denoted by τ− and the antitau by τ+.
Tau leptons have a lifetime of 6987290000000000000♠2.9×10−13 s and a mass of 7003177682000000000♠1776.82 MeV/c2 (compared to 7002105700000000000♠105.7 MeV/c2 for muons and 6999511000000000000♠0.511 MeV/c2 for electrons). Since their interactions are very similar to those of the electron, a tau can be thought of as a much heavier version of the electron. Because of their greater mass, tau particles do not emit as much bremsstrahlung radiation as electrons; consequently they are potentially highly penetrating, much more so than electrons. However, because of their short lifetime, the range of the tau is mainly set by their decay length, which is too small for bremsstrahlung to be noticeable: their penetrating power appears only at ultra high energy (above PeV energies).
Podcasts:
Dope Boyz
by: T.I.Ay, ay, ay, what you need shawty
Ay shawty man a I got 5 for 45 shawty, 5 for 45
Well shit what you need shawty
Ay these these bd's right here shawty
Ay this that this that noyd too shawty
You can't get no better than this right here
Ay nigga well get the fuck out my trapp then
A crack a ki' a crumb do it fifty mo' times
The quarter go for 5 and the half go for 9
Still in the trapp wit them break down dimes
Hit me on the hipper anytime, I don't mind
Why y'all niggas bitching on and whining I'm a grind
Shack it in the winter and the summer I'm a shine (getting mine)
It's plenty of money to be made from Candler Road to Bankhead
It's plenty of room to get paid for those that ain't scared
I got the hard for the j's and dro' for the dank heads
The dope game still strong like pimping ain't dead
Heard what I said I ain't buying no yell
Weighing 36 o's or more on a triple beam scale
Yeah, look like you got that touchy bug shawty
Standing round in my trapp I think you fucking up shawty
Same nigga who taut a k getting paid in the trapp
Made a song for the niggas and the J's in da trapp
For the...
Da dope boyz in the trapp nigga
The thug nigga, drug dealer where you at nigga
I say the, da dope boyz in the trapp nigga
The thug nigga, drug dealer where you at, a where you at nigga
Ya dope boyz in the trapp nigga
The thug nigga, drug dealer where you at, a where you at nigga
Ya dope boyz in the trapp nigga
This for da, ya dope boyz in the trapp nigga
Never everybody in the swats know I got the fiyah fiyah
Nigga want that weight got it for the high high
You can't even supply the package I buy
I get it and I cook and it's gone for it dry
Get a quarter ki and cut it down to all dimes
Buy my own blow so the profits all mine
How we gone shine?, the same way we gone grind
Niggas ain't gone be able to see us hey, they gone think they gone blind
C got choppers on his vert and I got daden's on mine
Triple gold and vogues, poppin' moe' blowin' pine
Honey brown wood grain wheel in the 'lac
Oak on the dash and the 12's in the back
Came for years of trappin', staying down wit the crack
Now that I made it rapping I ain't never going back
I'ma let the paper stack till it can't no more
Still got love for my niggas slangin' blow
Getting do' fo' sure
I remember it all started wit a quarter ounce of hard
Me and C-Roy crunked the trapp up in Cobb
Nann nigga barred we the trillest niggas living
If this ain't yo trapp then what the fuck you doing in it?
What the muthafucking business, do you think you puttin down?
If so then my corner you need to get the fuck from round
Unless you wanna sell some weed my nigga Beed got the pound
Anything else I don't need ya help, I got the hard locked down
37's ki's in da grill of the broam
Jumped from 33 to my folk in Boyd homes
All most gone ain't got but four mo'
Eternal Simpson Road ain't no more blow
Nothing left for you but to count my do'
Just something else to do while I blow my dro'
350k what I paid for the shit
Made 850 quick when I flipped all these bricks
Getting rich in this bitch
(T.I. shouting out da dope boyz!)
Ay one time for da dope boyz in ATL
From the SWATS on Campbelton Road
on over to the Westside on Bankhead, ya understand
On over to Candler Road
Ay I know y'all niggaz out there getting money in Decatur
Got damn ay we going on down to Miami shawty
Ay we know y'all niggas got them thangs down there for the low
I'm coming to get some
Ay one time for my niggas up in Tennessee shawty
Up in Orange Mound, y'all niggas trapp rolling good