Four negatively charged particles each carry a charge qn and form a square of side length d. A positively charged particle carrying a charge qp is at the square's center.
If the arrangement is in equilibrium (the vector sum of the electric forces on each particle is zero), what is the numerical value of the ratio qp/qn?

The a992 steel rod bc has a diameter of 50 mm and is used as a strut to support the beam. determine the maximum intensity w of the uniform distributed load that can be applied to the beam without risk of causing the strut to buckle. take f.s. = 2 against bucklin

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

Asatellite component is in the shape of a cube with 10cm edges, has an evenly distributed mass of 2 kg and one bolt hole at each of four corners. if the maximum predicted random vibration environment is 10 grms, what bolt size would be a good choice for restraint? what other factors might drive bolt size besides force/stress?