Problem 5.33 (Multistep) In the dark in outer space, you observe a glowing ball of known mass 4.6 kg moving in the plane at constant speed in a circle of radius 7.5 m, with the center of the circle at the origin (<0, 0, 0> m). You can't see what's making it move in a circle. At time 0 the ball is at location <7.5, 0, 0> m and has velocity <0, -80, 0> 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.

Each line (unit) on the horizontal axis represents: 5 years 10 years 20 years all of the above

Does the asteroid belt revolve around the sun?