Which is the example of circular motion?? 1)Ferris Wheel
2) Falling raindrop
3)The person sitting in ferris wheel
4)none of them
Guys am so confused in this question. Can u please answer this for me.??​And also ferris wheel and person sitting on j ferris wheel is same like circular and ferris wheel can be rotational motion. So pl for me answer this.​

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.