Four particles are located at the corners of a square of sides initially s in length, each particle ,moving directly toward its clockwise-nearest neighbor with constant speed v. describe qualitatively the subsequent paths of the particles. how long does it tkae for the particles to collide? [hint: consider the time derivative of the seperation vector, r=r_1-r_2, of two of the particles.]

In 1995 a research group led by eric cornell and carl wiemann at the university of colorado successfully cooled rubidium atoms to the 20-200 nk temperature range. assuming (incorrectly) that the rubidium atoms behave liké particles of a classical ideal gas, calculate the rms speed of a rubidium atom at a temperature of 112.0 nk. in the experiments one particular isotope of rubidium was used, rubidium-87. the molar mass of this isotope is 86.91 q/mol. tries 0/20 submit answer

The slope of a velocity time graph over any interval of time gives the during that interval

Which governments provide garbage collection services to homes and businesses