Which conclusion is supported by the data in the table?
An increase in the mass of an object causes the same decrease in the gravitational force.
An increase in the distance between the objects causes the same decrease in the gravitational force.
An increase in the distance between the objects causes a greater change in the gravitational force than the same
increase in mass.
An increase in the mass causes a greater change in the gravitational force than the same increase in the distance
between the objects.

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.