016 (part 1 of 2) 10.0 points
a neutron in a reactor makes an elastic head-
on collision with the nucleus of an atom ini-
tially at rest.
assume: the mass of the atomic nucleus is
about 11.8 the mass of the neutron.
what fraction of the neutron's kinetic en-
ergy is transferred to the atomic nucleus?
017 (part 2 of 2) 10.0 points
if the initial kinetic energy of the neutron is
2.72 x 10-1 j, find its final kinetic energy.
answer in units of j.

Identify two factors that determine the rate of stream erosion

Suppose water is leaking from a tank through a circular hole of area ah at its bottom. when water leaks through a hole, friction and contraction of the stream near the hole reduce the volume of water leaving the tank per second to cah 2gh , where c (0 < c < 1) is an empirical constant. a tank in the form of a right-circular cone standing on end, vertex down, is leaking water through a circular hole in its bottom. (assume the removed apex of the cone is of negligible height and volume.) (a) suppose the tank is 20 feet high and has radius 8 feet and the circular hole has radius 2 inches. the differential equation governing the height h in feet of water leaking from a tank after t seconds is dh dt = − 5 6h3/2 . if the height of the water is initially 8 feet, how long will it take the tank to empty? (round your answer to two decimal places.)

Which of the following compounds would be primarily ionic? methane, ch4, ammonia nh3, calcium chloride, cacl2, or carbon dioxide, co2