Let formula 40 be the collision cross section of one molecule colliding with another. Let formula 46 be the collision cross section of one molecule colliding with another. Geologists usually associate volcanic eruptions with the boundaries between colliding or diverging plates. The Roman philosopher, Lucretius held it was from the sound of hail colliding within clouds. At high pressures molecules are colliding more often. He would retire from the sprint race after colliding with Fuoco and spinning out. They roll weights representing their wealth, constantly colliding and quarreling. R136a1/2 showed relatively soft x-rays not thought to indicate a colliding winds binary. Deductions are imposed for colliding into obstacles or failing to land properly after a stunt. Motorists in western Canada are at some risk of colliding with bears. This is to avoid aircraft from the nearby airport colliding with the light pillars. Andersen suffered a bloodied nose after colliding with David West. The staggered setup minimizes the chance of spores colliding with neighboring basidia during release. In 2008, an operator forgot about this procedures which resulting in two streetcars colliding. Two examples of this interaction of a ridge colliding into a trench are well documented.