Question 14-50 in \"University Physics\", 11thed. asks what is the pressure as o

Question

   Question 14-50 in "University Physics", 11thed. asks what is the pressure as one goes deeper below the earth'ssurface. At the center of the earth the pressure would be ascalculated in the problem, 1.7E11 Pa, although the more correctanswer is 4E11 Pa as stated in the problem.    As one moves toward the center of theearth, gravity decreases until at the center it is zero. Without any gravity, how can you have any pressure?
Without gravity, it seems to me there would be no atmosphericpressure. No gravity, no pressure.    Obviously, I am confused, mixed up, orsomething.

   As one moves toward the center of theearth, gravity decreases until at the center it is zero. Without any gravity, how can you have any pressure?
Without gravity, it seems to me there would be no atmosphericpressure. No gravity, no pressure.    Obviously, I am confused, mixed up, orsomething.

Without gravity, it seems to me there would be no atmosphericpressure. No gravity, no pressure.    Obviously, I am confused, mixed up, orsomething.

Explanation / Answer

You say as I that there is no gravity at the center of the earth (it decreases as you go down).  You then go on to say that the extreme pressure is the result of the massive weight of the overlying rock.  But...gravity causes things to have weight and pressure is weight per unit area so again how do you have pressure in the absence of gravity?

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