What is a large collection of stars, gas, and dust is held together by gravity?

Nickel crystallizes in the face-centered cubic (fcc) lattice. the density of the metal is 8902 kg/m3. calculate the radius of a nickel atom.

Water is important for the of cells. a: size, shape, and temperature b: temperature, color, and odor c: color, odor, and size d: shape, temperature, and color

Particles vibrate in a rigid structure and do not move relative to their neighbors.