Two friends are standing on opposite ends of a canoe. the canoe is at rest with respect to the lake. then the friend at the north end of the canoe throws a very massive ball to the friend at the south end of the canoe, who catches it. how does the canoe move, if at all, as a result? a. the canoe accelerates to the south. b. the canoe remains motionless. c. the canoe accelerates to the north

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

Arrange the images in order to show how lake-effect snow occurs.

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.