The metal niobium has a bcc crystal structure. if the angle of diffraction for the (211) set of planes occurs at 75.99°(first-order reflection) when monochromaticx-radiation having a wavelength of 0.1659 nm is used, compute (a)the interplanar spacing for this set of planes, and (b) the atomic radius for the niobium atom.

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward