Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated by the same distance, which pair experiences the greatest gravitational attraction?

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.

the answer is c.the valence of the atoms combine .