You are on a parkour course. first you climb a angled wall up 9.5 meters. they you shimmy along the edge of a 3.5 meter long wall. lastly you traverse 15 meters of obstacles to reach the end of the course. the trip takes 43 seconds. what is your average speed? 0.22 m/s 1204 m/s 0.65 m/s 1.5 m/s

Uranium has two naturally occurring isotopes. 238u has a natural abundance of 99.3% and 235u has an abundance of 0.7%. it is the rarer 235u that is needed for nuclear reactors. the isotopes are separated by forming uranium hexafluoride uf6, which is a gas, then allowing it to diffuse through a series of porous membranes. 235uf6 has a slightly larger rms speed than 238uf6 and diffuses slightly faster. many repetitions of this procedure gradually separate the two isotopes. what is the ratio of the rms speed of 235uf6 to that of 238uf6? express your answer to five significant figures.