You pull on a wagon resting on the sidewalk. what will happen next. a. the wagon does not move because the wagon applies more force to you than you apply to the wagon. b. the wagon moves because you apply more friction to the ground. c. the wagon does not move because the force you apply to the wagon is equal to the force it applies to you. d. the wagon moves because you apply more force to the wagon than it applies to you.

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.