Abaseball is hit from a height of 4 feet above the ground with an initial velocity of 110 feet per second and at an angle of 35 ° above the horizontal. find the maximum height reached by the baseball. determine whether it will clear a 10-foot-highfence located 375 feet from home plate. use the model for projectile motion, assuming there is no air resistance.

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.