Plz 1. what is the process whereby stars create elements heavier than hydrogen? a. hydrogenation b. atom splittting c. atomic growing d. nuclear fusion 2. very heavy elements such as gold and uranium are formed by a. hydrogen burning in small stars b. nuclear spltting c. loss of neutrons d. supernova explosions 3. when a star becomes a red giant it will a. shrink and cool b. shrink c. shine hotter d. expand and cool 4. a low mass star that converts helium to carbon is a a. red giant b. black dwarf c. protostar d. white dwarf

Aball is thrown from the top of a building with an initial velocity of 21.9 m/s straight upward, at an initial height of 51.6 m above the ground. the ball just misses the edge of the roof on its way down, as shown in the figure. (a) determine the time needed for the ball to reach its maximum height. (b) determine the maximum height. (c) determine the time needed for the ball to return to the height from which it was thrown, and the velocity of the ball at that instant. (d) determine the time needed for the ball to reach the ground. (e) determine the velocity and position of the ball at t = 5.35 s.