A closed cylindrical tank containing a pressurized fluid has an inside diameter of 790 mm and a wall thickness of 8.6 mm. The stresses in the wall of the tank acting on a rotated element have the following values: 45MPa, 30MPa, 10MPa. Determine the fluid pressure.

Materials will have different energies associated with the electrons inside them. this is related to how strongly bound they are by their work function. if we sandwich a material with a very low energy between two materials with a high energy, we create a trap for an electron. if this trap is very narrow in one direction in comparison to the others, this is approximately a 1-dimensional box that confines the electron. what is the lowest energy of an electron in the box if the thinnest direction across the materials is 4.81 nm?

Element with 5protons and 3neutrons

What would be the net charge of 1 gram gold piece after removal of 1% of its electrons