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?

Astone is dropped from a cliff and falls 9.44 meters. what is the speed of the stone when it reaches the ground? a. 13.6 m/sec b. 1.39 m/sec c. 185 m/sec d. 9.80 m/sec

Acapacitor is storing energy of 3 joules with a voltage of 50 volts across its terminals. a second identical capacitor of the same value is storing energy of 1 joule. what is the voltage across the terminals of the second capacitor?

Debris produced by mining is called