Alex climbs to the top of a tall tree while his friend gary waits on the ground below. alex throws down a ball at 8 m/s from 50 m above the ground at the same time gary throws a ball up. at what speed must gary throw a ball up in order for the two balls to cross paths 25 m above the ground? the starting height of the ball thrown upward is 1.5 m above the ground. ignore the effects of air resistance. whats the answer in m/s?

Write the equation for momentum, first using symbols for the variables, then using words for the variables.

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

Neutrons are placed in a magnetic field with magnitude 2.30 t. part a part complete what is the energy difference between the states with the nuclear spin angular momentum components parallel and antiparallel to the field? δe δ e = 2.77×10−7 ev previous answers correct part b part complete which state is lower in energy: the one with its spin component parallel to the field or the one with its spin component antiparallel to the field? which state is lower in energy: the one with its spin component parallel to the field or the one with its spin component antiparallel to the field? parallel antiparallel previous answers correct part c part complete how do your results compare with the energy states for a proton in the same field (δe=4.05×10−7ev)? how do your results compare with the energy states for a proton in the same field this result is smaller than but comparable to that found in the example for protons. this result is greater than but comparable to that found in the example for protons. previous answers correct part d the neutrons can make transitions from one of these states to the other by emitting or absorbing a photon with energy equal to the energy difference of the two states. find the frequency of such a photon. f f = mhz previous answersrequest answer incorrect; try again; 5 attempts remaining