James throws a baseball straight upward. We can ignore air resistance. What is true about the acceleration and velocity of the ball on its way down? Assume that upward is the positive direction. Choose 1 Choose 1 (Choice A) A Acceleration remains constant and velocity is negative and increasing. (Choice B) B Acceleration decreases and velocity is positive and decreasing. (Choice C) C Acceleration increases and velocity is negative and decreasing. (Choice D, Checked) D Acceleration remains constant and velocity is negative and decreasing.

If jill was traveling at 300 miles in 4 hours due south what was his velocity in miles per minute a) 75 miles per hour due south b) .02 miles per second due south c) .5 miles per second due south d) 1 mile per hour due south

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.

Five structural isomers have the formula c6h14. where needed, draw the structure and give the iupac name of all five isomers.