I need to find P in this question. I found as answer 2,71 kN but don't know if it is wright.
The material is steel : 200 GPa
The outer circle is 50 mm, the inner circle is 48 mm.
Could you help me?

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?

If the new moon happens on january 15th, what shape will it be on february 6th?

Estimate the change in the gibbs energy and molar gibbs energy of 1.0dm3 of octane when the pressure acting on it is increased from 1.0 atm to 100 atm. the mass density of octane is 0.703 g cm−3