text: Pennsylvania (Pennsylvania German: "Pennsylvaani"), officially the Commonwealth of Pennsylvania, is a state located in the northeastern and Mid-Atlantic regions of the United States. The Appalachian Mountains run through its middle. The commonwealth borders Delaware to the southeast, Maryland to the south, West Virginia to the southwest, Ohio to the west, Lake Erie and the Canadian province of Ontario to the northwest, New York to the north, and New Jersey to the east.

text: Pennsylvania

text: Pennsylvania

text: German

text: Pennsylvaani

text: officially

text: the

text: Commonwealth

text: of

text: Pennsylvania

text: is

text: state

text: located

text: in

text: the

text: northeastern

text: and

text: Mid

text: Atlantic

text: regions

text: of

text: the

text: United

text: States

text: The

text: Appalachian

text: Mountains

text: run

text: through

text: its

text: middle

text: The

text: commonwealth

text: borders

text: Delaware

text: to

text: the

text: southeast

text: Maryland

text: to

text: the

text: south

text: West

text: Virginia

text: to

text: the

text: southwest

text: Ohio

text: to

text: the

text: west

text: Lake

text: Erie

text: and

text: the

text: Canadian

text: province

text: of

text: Ontario

text: to

text: the

text: northwest

text: New

text: York

text: to

text: the

text: north

text: and

text: New

text: Jersey

text: to

text: the

text: east

text: Philadelphia is the largest city in the Commonwealth of Pennsylvania and the fifth-most populous city in the United States, with an estimated population of 1,567,442 and more than 6 million in the seventh-largest metropolitan statistical area, . Philadelphia is the economic and cultural anchor of the Delaware Valleya region located in the Northeastern United States at the confluence of the Delaware and Schuylkill rivers with 7.2 million people residing in the eighth-largest combined statistical area in the United States.

text: Philadelphia

text: is

text: the

text: largest

text: city

text: in

text: the

text: Commonwealth

text: of

text: Pennsylvania

text: and

text: the

text: fifth

text: most

text: populous

text: city

text: in

text: the

text: United

text: States

text: with

text: an

text: estimated

text: population

text: of

text: and

text: more

text: than

text: million

text: in

text: the

text: seventh

text: largest

text: metropolitan

text: statistical

text: area

text: Philadelphia

text: is

text: the

text: economic

text: and

text: cultural

text: anchor

text: of

text: the

text: Delaware

text: Valleya

text: region

text: located

text: in

text: the

text: Northeastern

text: United

text: States

text: at

text: the

text: confluence

text: of

text: the

text: Delaware

text: and

text: Schuylkill

text: rivers

text: with

text: million

text: people

text: residing

text: in

text: the

text: eighth

text: largest

text: combined

text: statistical

text: area

text: in

text: the

text: United

text: States

text: Cast iron is a group of iron-carbon alloys with a carbon content greater than 2%. Its usefulness derives from its relatively low melting temperature. The alloy constituents affect its colour when fractured: white cast iron has carbide impurities which allow cracks to pass straight through; grey cast iron has graphite flakes which deflect a passing crack and initiate countless new cracks as the material breaks; ductile cast iron has spherical graphite "nodules" which stop the crack from further progressing.

text: Cast

text: iron

text: is

text: group

text: of

text: iron

text: carbon

text: alloys

text: with

text: carbon

text: content

text: greater

text: than

text: Its

text: usefulness

text: derives

text: from

text: its

text: relatively

text: low

text: melting

text: temperature

text: The

text: alloy

text: constituents

text: affect

text: its

text: colour

text: when

text: fractured

text: white

text: cast

text: iron

text: has

text: carbide

text: impurities

text: which

text: allow

text: cracks

text: to

text: pass

text: straight

text: through

text: grey

text: cast

text: iron

text: has

text: graphite

text: flakes

text: which

text: deflect

text: passing

text: crack

text: and

text: initiate

text: countless

text: new

text: cracks

text: as

text: the

text: material

text: breaks

text: ductile

text: cast

text: iron

text: has

text: spherical

text: graphite

text: nodules

text: which

text: stop

text: the

text: crack

text: from

text: further

text: progressing

text: The Chestnut Street Bridge is a bridge across the Schuylkill River that carries Chestnut Street in Philadelphia , USA . The original 1861 bridge was `` a bridge whose scale and use of cast iron made it singular in the United States and throughout the world '' . The 1957 bridge , now one way , helps connect West Philadelphia with the rest of the city .

text: The

text: Chestnut

text: Street

text: Bridge

text: is

text: bridge

text: across

text: the

text: Schuylkill

text: River

text: that

text: carries

text: Chestnut

text: Street

text: in

text: Philadelphia

text: USA

text: The

text: original

text: bridge

text: was

text: bridge

text: whose

text: scale

text: and

text: use

text: of

text: cast

text: iron

text: made

text: it

text: singular

text: in

text: the

text: United

text: States

text: and

text: throughout

text: the

text: world

text: The

text: bridge

text: now

text: one

text: way

text: helps

text: connect

text: West

text: Philadelphia

text: with

text: the

text: rest

text: of

text: the

text: city

text: Graphite, archaically referred to as plumbago, is a crystalline form of carbon, a semimetal, a native element mineral, and one of the allotropes of carbon. Graphite is the most stable form of carbon under standard conditions. Therefore, it is used in thermochemistry as the standard state for defining the heat of formation of carbon compounds.

text: Graphite

text: archaically

text: referred

text: to

text: as

text: plumbago

text: is

text: crystalline

text: form

text: of

text: carbon

text: semimetal

text: native

text: element

text: mineral

text: and

text: one

text: of

text: the

text: allotropes

text: of

text: carbon

text: Graphite

text: is

text: the

text: most

text: stable

text: form

text: of

text: carbon

text: under

text: standard

text: conditions

text: Therefore

text: it

text: is

text: used

text: in

text: thermochemistry

text: as

text: the

text: standard

text: state

text: for

text: defining

text: the

text: heat

text: of

text: formation

text: of

text: carbon

text: compounds

text: The Eastern United States, commonly referred to as the American East or simply the East, is a region roughly coinciding with the boundaries of the United States established in the 1783 Treaty of Paris, which bounded the new country to the west along the Mississippi River. It is geographically diverse, spanning the Northeast and Southeast as well as the eastern part of the Central United States.

text: The

text: Eastern

text: United

text: States

text: commonly

text: referred

text: to

text: as

text: the

text: American

text: East

text: or

text: simply

text: the

text: East

text: is

text: region

text: roughly

text: coinciding

text: with

text: the

text: boundaries

text: of

text: the

text: United

text: States

text: established

text: in

text: the

text: Treaty

text: of

text: Paris

text: which

text: bounded

text: the

text: new

text: country

text: to

text: the

text: west

text: along

text: the

text: Mississippi

text: River

text: It

text: is

text: geographically

text: diverse

text: spanning

text: the

text: Northeast

text: and

text: Southeast

text: as

text: well

text: as

text: the

text: eastern

text: part

text: of

text: the

text: Central

text: United

text: States

text:
The Delaware River is a major river on the Atlantic coast of the United States. Its watershed drains an area of in five U.S. statesNew York, New Jersey, Pennsylvania, Maryland and Delaware. Rising in two branches in New York state's Catskill Mountains, the river flows into Delaware Bay where its waters enter the Atlantic Ocean near Cape May in New Jersey and Cape Henlopen in Delaware. Not including Delaware Bay, the river's length including its two branches is .
The Delaware River is one of nineteen "Great Waters" recognized by the America's Great Waters Coalition.

text: The

text: Delaware

text: River

text: is

text: major

text: river

text: on

text: the

text: Atlantic

text: coast

text: of

text: the

text: United

text: States

text: Its

text: watershed

text: drains

text: an

text: area

text: of

text: in

text: five

text: U.S.

text: statesNew

text: York

text: New

text: Jersey

text: Pennsylvania

text: Maryland

text: and

text: Delaware

text: Rising

text: in

text: two

text: branches

text: in

text: New

text: York

text: state

text: 's

text: Catskill

text: Mountains

text: the

text: river

text: flows

text: into

text: Delaware

text: Bay

text: where

text: its

text: waters

text: enter

text: the

text: Atlantic

text: Ocean

text: near

text: Cape

text: May

text: in

text: New

text: Jersey

text: and

text: Cape

text: Henlopen

text: in

text: Delaware

text: Not

text: including

text: Delaware

text: Bay

text: the

text: river

text: 's

text: length

text: including

text: its

text: two

text: branches

text: is

text: The

text: Delaware

text: River

text: is

text: one

text: of

text: nineteen

text: Great

text: Waters

text: recognized

text: by

text: the

text: America

text: 's

text: Great

text: Waters

text: Coalition

text: Tin is a chemical element with the symbol Sn (for ) and atomic number 50, is a post-transition metal in group 14 of the periodic table. It is obtained chiefly from the mineral cassiterite, which contains tin dioxide, SnO. Tin shows a chemical similarity to both of its neighbors in group 14, germanium and lead, and has two main oxidation states, +2 and the slightly more stable +4. Tin is the 49th most abundant element and has, with 10 stable isotopes, the largest number of stable isotopes in the periodic table, thanks to its magic number of protons. It has two main allotropes: at room temperature, the stable allotrope is -tin, a silvery-white, malleable metal, but at low temperatures it transforms into the less dense grey -tin, which has the diamond cubic structure. Metallic tin is not easily oxidized in air.

text: Tin

text: is

text: chemical

text: element

text: with

text: the

text: symbol

text: Sn

text: for

text: and

text: atomic

text: number

text: is

text: post

text: transition

text: metal

text: in

text: group

text: of

text: the

text: periodic

text: table

text: It

text: is

text: obtained

text: chiefly

text: from

text: the

text: mineral

text: cassiterite

text: which

text: contains

text: tin

text: dioxide

text: SnO.

text: Tin

text: shows

text: chemical

text: similarity

text: to

text: both

text: of

text: its

text: neighbors

text: in

text: group

text: germanium

text: and

text: lead

text: and

text: has

text: two

text: main

text: oxidation

text: states

text: and

text: the

text: slightly

text: more

text: stable

text: Tin

text: is

text: the

text: most

text: abundant

text: element

text: and

text: has

text: with

text: stable

text: isotopes

text: the

text: largest

text: number

text: of

text: stable

text: isotopes

text: in

text: the

text: periodic

text: table

text: thanks

text: to

text: its

text: magic

text: number

text: of

text: protons

text: It

text: has

text: two

text: main

text: allotropes

text: at

text: room

text: temperature

text: the

text: stable

text: allotrope

text: is

text: -tin

text: silvery

text: white

text: malleable

text: metal

text: but

text: at

text: low

text: temperatures

text: it

text: transforms

text: into

text: the

text: less

text: dense

text: grey

text: -tin

text: which

text: has

text: the

text: diamond

text: cubic

text: structure

text: Metallic

text: tin

text: is

text: not

text: easily

text: oxidized

text: in

text: air

text: A tributary or affluent is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage basin of its surface water and groundwater, leading the water out into an ocean.

text: tributary

text: or

text: affluent

text: is

text: stream

text: or

text: river

text: that

text: flows

text: into

text: larger

text: stream

text: or

text: main

text: stem

text: or

text: parent

text: river

text: or

text: lake

text: tributary

text: does

text: not

text: flow

text: directly

text: into

text: sea

text: or

text: ocean

text: Tributaries

text: and

text: the

text: main

text: stem

text: river

text: drain

text: the

text: surrounding

text: drainage

text: basin

text: of

text: its

text: surface

text: water

text: and

text: groundwater

text: leading

text: the

text: water

text: out

text: into

text: an

text: ocean

text: The Northeastern United States, also referred to as the American Northeast or simply the Northeast, is a geographical region of the United States of America bordered to the north by Canada, to the east by the Atlantic Ocean, to the south by the Southern United States, and to the west by the Midwestern United States. The Northeast is one of the four regions defined by the Census Bureau for the collection and analysis of statistics. The Census Bureau-defined region has a total area of with of that being land mass. Though lacking a unified cultural identity, the Northeastern region is the nation's most economically developed, densely populated, and culturally diverse region. Of the nation's four census regions, the Northeast is the second most urban, with 85 percent of its population residing in urban areas, led by the West with 90 percent.

text: The

text: Northeastern

text: United

text: States

text: also

text: referred

text: to

text: as

text: the

text: American

text: Northeast

text: or

text: simply

text: the

text: Northeast

text: is

text: geographical

text: region

text: of

text: the

text: United

text: States

text: of

text: America

text: bordered

text: to

text: the

text: north

text: by

text: Canada

text: to

text: the

text: east

text: by

text: the

text: Atlantic

text: Ocean

text: to

text: the

text: south

text: by

text: the

text: Southern

text: United

text: States

text: and

text: to

text: the

text: west

text: by

text: the

text: Midwestern

text: United

text: States

text: The

text: Northeast

text: is

text: one

text: of

text: the

text: four

text: regions

text: defined

text: by

text: the

text: Census

text: Bureau

text: for

text: the

text: collection

text: and

text: analysis

text: of

text: statistics

text: The

text: Census

text: Bureau

text: defined

text: region

text: has

text: total

text: area

text: of

text: with

text: of

text: that

text: being

text: land

text: mass

text: Though

text: lacking

text: unified

text: cultural

text: identity

text: the

text: Northeastern

text: region

text: is

text: the

text: nation

text: 's

text: most

text: economically

text: developed

text: densely

text: populated

text: and

text: culturally

text: diverse

text: region

text: Of

text: the

text: nation

text: 's

text: four

text: census

text: regions

text: the

text: Northeast

text: is

text: the

text: second

text: most

text: urban

text: with

text: percent

text: of

text: its

text: population

text: residing

text: in

text: urban

text: areas

text: led

text: by

text: the

text: West

text: with

text: percent

text: A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases a river flows into the ground and becomes dry at the end of its course without reaching another body of water. Small rivers can be referred to using names such as stream, creek, brook, rivulet, and rill. There are no official definitions for the generic term river as applied to geographic features, although in some countries or communities a stream is defined by its size. Many names for small rivers are specific to geographic location; examples are "run" in some parts of the United States, "burn" in Scotland and northeast England, and "beck" in northern England. Sometimes a river is defined as being larger than a creek, but not always: the language is vague.

text: river

text: is

text: natural

text: flowing

text: watercourse

text: usually

text: freshwater

text: flowing

text: towards

text: an

text: ocean

text: sea

text: lake

text: or

text: another

text: river

text: In

text: some

text: cases

text: river

text: flows

text: into

text: the

text: ground

text: and

text: becomes

text: dry

text: at

text: the

text: end

text: of

text: its

text: course

text: without

text: reaching

text: another

text: body

text: of

text: water

text: Small

text: rivers

text: can

text: be

text: referred

text: to

text: using

text: names

text: such

text: as

text: stream

text: creek

text: brook

text: rivulet

text: and

text: rill

text: There

text: are

text: no

text: official

text: definitions

text: for

text: the

text: generic

text: term

text: river

text: as

text: applied

text: to

text: geographic

text: features

text: although

text: in

text: some

text: countries

text: or

text: communities

text: stream

text: is

text: defined

text: by

text: its

text: size

text: Many

text: names

text: for

text: small

text: rivers

text: are

text: specific

text: to

text: geographic

text: location

text: examples

text: are

text: run

text: in

text: some

text: parts

text: of

text: the

text: United

text: States

text: burn

text: in

text: Scotland

text: and

text: northeast

text: England

text: and

text: beck

text: in

text: northern

text: England

text: Sometimes

text: river

text: is

text: defined

text: as

text: being

text: larger

text: than

text: creek

text: but

text: not

text: always

text: the

text: language

text: is

text: vague

text: Iron is a chemical element with symbol Fe (from ) and atomic number 26. It is a metal in the first transition series. It is by mass the most common element on Earth, forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust. Its abundance in rocky planets like Earth is due to its abundant production by fusion in high-mass stars, where it is the last element to be produced with release of energy before the violent collapse of a supernova, which scatters the iron into space.

text: Iron

text: is

text: chemical

text: element

text: with

text: symbol

text: Fe

text: from

text: and

text: atomic

text: number

text: It

text: is

text: metal

text: in

text: the

text: first

text: transition

text: series

text: It

text: is

text: by

text: mass

text: the

text: most

text: common

text: element

text: on

text: Earth

text: forming

text: much

text: of

text: Earth

text: 's

text: outer

text: and

text: inner

text: core

text: It

text: is

text: the

text: fourth

text: most

text: common

text: element

text: in

text: the

text: Earth

text: 's

text: crust

text: Its

text: abundance

text: in

text: rocky

text: planets

text: like

text: Earth

text: is

text: due

text: to

text: its

text: abundant

text: production

text: by

text: fusion

text: in

text: high

text: mass

text: stars

text: where

text: it

text: is

text: the

text: last

text: element

text: to

text: be

text: produced

text: with

text: release

text: of

text: energy

text: before

text: the

text: violent

text: collapse

text: of

text: supernova

text: which

text: scatters

text: the

text: iron

text: into

text: space

text: The Pocono Mountains, commonly referred to as the Poconos, is a geographical, geological, and cultural region located in Northeastern Pennsylvania, United States. The Poconos are an upland of the larger Allegheny Plateau. Forming a escarpment overlooking the Delaware River and Delaware Water Gap to the east, the mountains are bordered on the north by Lake Wallenpaupack, on the west by the Wyoming Valley and the Coal Region, and to the south by the Lehigh Valley. It comes from the Munsee word "Pokawachne", which means "Creek Between Two Hills." Much of the Poconos region lies within the Greater New York-Newark, NY-NJ-CT-PA Combined Statistical Area. The wooded hills and valleys have long been a popular recreation area, accessible within a two-hour drive to millions of metropolitan area residents, with many communities having resort hotels with fishing, hunting, skiing, and other sports facilities.

text: The

text: Pocono

text: Mountains

text: commonly

text: referred

text: to

text: as

text: the

text: Poconos

text: is

text: geographical

text: geological

text: and

text: cultural

text: region

text: located

text: in

text: Northeastern

text: Pennsylvania

text: United

text: States

text: The

text: Poconos

text: are

text: an

text: upland

text: of

text: the

text: larger

text: Allegheny

text: Plateau

text: Forming

text: escarpment

text: overlooking

text: the

text: Delaware

text: River

text: and

text: Delaware

text: Water

text: Gap

text: to

text: the

text: east

text: the

text: mountains

text: are

text: bordered

text: on

text: the

text: north

text: by

text: Lake

text: Wallenpaupack

text: on

text: the

text: west

text: by

text: the

text: Wyoming

text: Valley

text: and

text: the

text: Coal

text: Region

text: and

text: to

text: the

text: south

text: by

text: the

text: Lehigh

text: Valley

text: It

text: comes

text: from

text: the

text: Munsee

text: word

text: Pokawachne

text: which

text: means

text: Creek

text: Between

text: Two

text: Hills

text: Much

text: of

text: the

text: Poconos

text: region

text: lies

text: within

text: the

text: Greater

text: New

text: York

text: Newark

text: NY

text: NJ

text: CT

text: PA

text: Combined

text: Statistical

text: Area

text: The

text: wooded

text: hills

text: and

text: valleys

text: have

text: long

text: been

text: popular

text: recreation

text: area

text: accessible

text: within

text: two

text: hour

text: drive

text: to

text: millions

text: of

text: metropolitan

text: area

text: residents

text: with

text: many

text: communities

text: having

text: resort

text: hotels

text: with

text: fishing

text: hunting

text: skiing

text: and

text: other

text: sports

text: facilities

text: Southwest Philadelphia (formerly Kingsessing Township) is a section of Philadelphia, Pennsylvania, United States. The section can be described as extending from the western side of the Schuylkill River to the city line, with the SEPTA. The northern border is defined by the Philadelphia City Planning Commission as east from the city line along Baltimore Avenue moving south along 51st Street to Springfield Ave. It follows the train tracks until 49th Street. From 49th and Kingsessing Ave the line moves east along Kingsessing Ave. The line then moves south along 46th St to Paschall Ave where it jogs to join Grays Ferry where the line runs to the Schuylkill River.

text: Southwest

text: Philadelphia

text: formerly

text: Kingsessing

text: Township

text: is

text: section

text: of

text: Philadelphia

text: Pennsylvania

text: United

text: States

text: The

text: section

text: can

text: be

text: described

text: as

text: extending

text: from

text: the

text: western

text: side

text: of

text: the

text: Schuylkill

text: River

text: to

text: the

text: city

text: line

text: with

text: the

text: SEPTA

text: The

text: northern

text: border

text: is

text: defined

text: by

text: the

text: Philadelphia

text: City

text: Planning

text: Commission

text: as

text: east

text: from

text: the

text: city

text: line

text: along

text: Baltimore

text: Avenue

text: moving

text: south

text: along

text: Street

text: to

text: Springfield

text: Ave

text: It

text: follows

text: the

text: train

text: tracks

text: until

text: Street

text: From

text: and

text: Kingsessing

text: Ave

text: the

text: line

text: moves

text: east

text: along

text: Kingsessing

text: Ave

text: The

text: line

text: then

text: moves

text: south

text: along

text: St

text: to

text: Paschall

text: Ave

text: where

text: it

text: jogs

text: to

text: join

text: Grays

text: Ferry

text: where

text: the

text: line

text: runs

text: to

text: the

text: Schuylkill

text: River

text: The Coal Region is a historically important coal-mining area in Northeastern Pennsylvania in the central Appalachian Mountains, comprising Lackawanna, Luzerne, Columbia, Carbon, Schuylkill, Northumberland, and the extreme northeast corner of Dauphin counties. Academics have made the distinction North Anthracite Coal Field and South Anthracite Coal Field (each of Pennsylvania), the lower region bearing the further classification Anthracite Uplands in physical geology.

text: The

text: Coal

text: Region

text: is

text: historically

text: important

text: coal

text: mining

text: area

text: in

text: Northeastern

text: Pennsylvania

text: in

text: the

text: central

text: Appalachian

text: Mountains

text: comprising

text: Lackawanna

text: Luzerne

text: Columbia

text: Carbon

text: Schuylkill

text: Northumberland

text: and

text: the

text: extreme

text: northeast

text: corner

text: of

text: Dauphin

text: counties

text: Academics

text: have

text: made

text: the

text: distinction

text: North

text: Anthracite

text: Coal

text: Field

text: and

text: South

text: Anthracite

text: Coal

text: Field

text: each

text: of

text: Pennsylvania

text: the

text: lower

text: region

text: bearing

text: the

text: further

text: classification

text: Anthracite

text: Uplands

text: in

text: physical

text: geology

text: West Philadelphia, nicknamed West Philly, is a section of Philadelphia, Pennsylvania. Though there is no official definition of its boundaries, it is generally considered to reach from the western shore of the Schuylkill River, to City Avenue to the northwest, Cobbs Creek to the southwest, and the SEPTA Media/Elwyn Line to the south. An alternate definition includes all city land west of the Schuylkill; this would also include Southwest Philadelphia and its neighborhoods. The eastern side of West Philadelphia is also known as University City.

text: West

text: Philadelphia

text: nicknamed

text: West

text: Philly

text: is

text: section

text: of

text: Philadelphia

text: Pennsylvania

text: Though

text: there

text: is

text: no

text: official

text: definition

text: of

text: its

text: boundaries

text: it

text: is

text: generally

text: considered

text: to

text: reach

text: from

text: the

text: western

text: shore

text: of

text: the

text: Schuylkill

text: River

text: to

text: City

text: Avenue

text: to

text: the

text: northwest

text: Cobbs

text: Creek

text: to

text: the

text: southwest

text: and

text: the

text: SEPTA

text: Media

text: Elwyn

text: Line

text: to

text: the

text: south

text: An

text: alternate

text: definition

text: includes

text: all

text: city

text: land

text: west

text: of

text: the

text: Schuylkill

text: this

text: would

text: also

text: include

text: Southwest

text: Philadelphia

text: and

text: its

text: neighborhoods

text: The

text: eastern

text: side

text: of

text: West

text: Philadelphia

text: is

text: also

text: known

text: as

text: University

text: City

text: Carbon (from "coal") is a chemical element with symbol C and atomic number 6. It is nonmetallic and tetravalentmaking four electrons available to form covalent chemical bonds. Three isotopes occur naturally, C and C being stable, while C is a radioactive isotope, decaying with a half-life of about 5,730 years. Carbon is one of the few elements known since antiquity.

text: Carbon

text: from

text: coal

text: is

text: chemical

text: element

text: with

text: symbol

text: and

text: atomic

text: number

text: It

text: is

text: nonmetallic

text: and

text: tetravalentmaking

text: four

text: electrons

text: available

text: to

text: form

text: covalent

text: chemical

text: bonds

text: Three

text: isotopes

text: occur

text: naturally

text: and

text: being

text: stable

text: while

text: is

text: radioactive

text: isotope

text: decaying

text: with

text: half

text: life

text: of

text: about

text: years

text: Carbon

text: is

text: one

text: of

text: the

text: few

text: elements

text: known

text: since

text: antiquity

text: The Schuylkill River (, locally ) is an important river in central and eastern Pennsylvania. Two of its tributaries drain parts of the Pocono Mountains in the east and Coal Region in the center of the state. It flows for before joining the Delaware River as its largest tributary, in Philadelphia.

text: The

text: Schuylkill

text: River

text: locally

text: is

text: an

text: important

text: river

text: in

text: central

text: and

text: eastern

text: Pennsylvania

text: Two

text: of

text: its

text: tributaries

text: drain

text: parts

text: of

text: the

text: Pocono

text: Mountains

text: in

text: the

text: east

text: and

text: Coal

text: Region

text: in

text: the

text: center

text: of

text: the

text: state

text: It

text: flows

text: for

text: before

text: joining

text: the

text: Delaware

text: River

text: as

text: its

text: largest

text: tributary

text: in

text: Philadelphia

text: Cobbs Creek is an tributary of Darby Creek in Delaware County, Pennsylvania, in the United States. It forms an approximate border between Montgomery County and Delaware County. After Cobbs Creek passes underneath Township Line Road (U.S. Route 1), it forms the border between Philadelphia County and Delaware County. It later joins Darby Creek before flowing into the Delaware River.

text: Cobbs

text: Creek

text: is

text: an

text: tributary

text: of

text: Darby

text: Creek

text: in

text: Delaware

text: County

text: Pennsylvania

text: in

text: the

text: United

text: States

text: It

text: forms

text: an

text: approximate

text: border

text: between

text: Montgomery

text: County

text: and

text: Delaware

text: County

text: After

text: Cobbs

text: Creek

text: passes

text: underneath

text: Township

text: Line

text: Road

text: U.S.

text: Route

text: it

text: forms

text: the

text: border

text: between

text: Philadelphia

text: County

text: and

text: Delaware

text: County

text: It

text: later

text: joins

text: Darby

text: Creek

text: before

text: flowing

text: into

text: the

text: Delaware

text: River

text: The Delaware Valley is the valley through which the Delaware River flows. By extension, this toponym is commonly used to refer to the Philadelphia metropolitan area ("the [Lower] Delaware Valley Metropolitan Area"), which straddles the Lower Delaware River just north of its estuary.

text: The

text: Delaware

text: Valley

text: is

text: the

text: valley

text: through

text: which

text: the

text: Delaware

text: River

text: flows

text: By

text: extension

text: this

text: toponym

text: is

text: commonly

text: used

text: to

text: refer

text: to

text: the

text: Philadelphia

text: metropolitan

text: area

text: the

text: Lower

text: Delaware

text: Valley

text: Metropolitan

text: Area

text: which

text: straddles

text: the

text: Lower

text: Delaware

text: River

text: just

text: north

text: of

text: its

text: estuary

text: In chemistry, a carbide is a compound composed of carbon and a less electronegative element. Carbides can be generally classified by chemical bonding type as follows: (i) salt-like, (ii) covalent compounds, (iii) interstitial compounds, and (iv) "intermediate" transition metal carbides. Examples include calcium carbide (CaC), silicon carbide (SiC), tungsten carbide (WC) (often called simply "carbide" when referring to machine tooling), and cementite (FeC), each used in key industrial applications. The naming of ionic carbides is not systematic.

text: In

text: chemistry

text: carbide

text: is

text: compound

text: composed

text: of

text: carbon

text: and

text: less

text: electronegative

text: element

text: Carbides

text: can

text: be

text: generally

text: classified

text: by

text: chemical

text: bonding

text: type

text: as

text: follows

text: salt

text: like

text: ii

text: covalent

text: compounds

text: iii

text: interstitial

text: compounds

text: and

text: iv

text: intermediate

text: transition

text: metal

text: carbides

text: Examples

text: include

text: calcium

text: carbide

text: CaC

text: silicon

text: carbide

text: SiC

text: tungsten

text: carbide

text: WC

text: often

text: called

text: simply

text: carbide

text: when

text: referring

text: to

text: machine

text: tooling

text: and

text: cementite

text: FeC

text: each

text: used

text: in

text: key

text: industrial

text: applications

text: The

text: naming

text: of

text: ionic

text: carbides

text: is

text: not

text: systematic

text: The Southeastern Pennsylvania Transportation Authority (SEPTA) is a regional public transportation authority that operates various forms of public transit servicesbus, subway and elevated rail, commuter rail, light rail and electric trolleybusthat serve 3.9 million people in five counties in and around Philadelphia, Pennsylvania, United States. SEPTA also manages construction projects that maintain, replace, and expand infrastructure and rolling stock.

text: The

text: Southeastern

text: Pennsylvania

text: Transportation

text: Authority

text: SEPTA

text: is

text: regional

text: public

text: transportation

text: authority

text: that

text: operates

text: various

text: forms

text: of

text: public

text: transit

text: servicesbus

text: subway

text: and

text: elevated

text: rail

text: commuter

text: rail

text: light

text: rail

text: and

text: electric

text: trolleybusthat

text: serve

text: million

text: people

text: in

text: five

text: counties

text: in

text: and

text: around

text: Philadelphia

text: Pennsylvania

text: United

text: States

text: SEPTA

text: also

text: manages

text: construction

text: projects

text: that

text: maintain

text: replace

text: and

text: expand

text: infrastructure

text: and

text: rolling

text: stock

question: located_in_the_administrative_territorial_entity chestnut street bridge

answer: pennsylvania

text: pennsylvania

text: pennsylvania

text: pennsylvania

text: pennsylvania

text: pennsylvania

text: pennsylvania

text: pennsylvania

text: pennsylvania

text: pennsylvania

text: pennsylvania

text: pennsylvania

text: pennsylvania

text: pennsylvania

text: pennsylvania