Object 1 is moving along the x axis with an initial momentum +16 kg·m/s, where the + sign indicates that it is moving to the right. as the drawing shows, object 1 collides with a second object that is initially at rest. the collision is not head-on, so the objects move off in different directions after the collision. the net external force acting on the two-object system is zero. after the collision, object 1 has a momentum whose x component is +6 kg·m/s. what is the x-component of the momentum of object 2 after the collision?

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.