Pressure In a Basketball

a. What is the inflation pressure in a basketball?

Basketball.png

(answer "inflated to between 7.5 and 8.5 pounds per square inch"; source Wikipedia)

b. What does this value of pressure mean? That is, what are the relevant scientific concepts?

c. Is pressure from "part a" gage pressure, absolute pressure, or vacuum pressure? Why?

d. What is the pressure from "part a" in SI units?
{hint: Table F.1}
{hint: internet calculator}

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