Fundamental force acting between elementary particles of matter, mainly quarks. The strong force binds quarks together in clusters to form protons and neutrons and heavier short-lived particles. It holds together the atomic nucleus and underlies interactions among all particles containing quarks. In strong interactions, quarks exchange gluons, carriers of the strong force, which are massless particles with one unit of intrinsic spin. Within its short range (about 10−15 m), the strong force appears to become stronger with distance. At such distances, the strong interaction between quarks is about 100 times greater than the electromagnetic force.
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There were 256 households out of which 29.3% had children under the age of 18 living with them, 37.5% were married couples living together, 23.8% had a female householder with no husband present, and 33.2% were non-families. 30.5% of all households were made up of individuals and 14.1% had someone living alone who was 65 years of age or older. The average household size was 2.54 and the average family size was 3.19.
In the city the population was spread out with 29.8% under the age of 18, 10.0% from 18 to 24, 22.6% from 25 to 44, 20.3% from 45 to 64, and 17.4% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 77.9 males. For every 100 females age 18 and over, there were 75.1 males.
The median income for a household in the city was $21,389, and the median income for a family was $26,023. Males had a median income of $25,750 versus $20,417 for females. The per capita income for the city was $10,802. About 24.3% of families and 32.3% of the population were below the poverty line, including 47.5% of those under age 18 and 22.6% of those age 65 or over.
Strong, Arkansas is home to the Strong Bulldogs, a football team from Strong-Huttig High School.