the decomposition of water into hydrogen gas h2 and oxygen gas o2 can be modeled by the balanced chemical equation
a) h2 + o2 → h2o
b) h2o → h2 + o2
c) 2h2 + o2 → 2h2o
d) 2h2o → 2h2 + o2

The momentum of an isolated system is conserved a) only in inelastic collisions. b) only in elastic collisions. c) in both elastic and inelastic collisions

The softest and hardest minerals are: softest hardest

Wo small variable-thrust jets are actuated to keep the spacecraft angular velocity about the z-axis constant at ? 0 = 1.16 rad/s as the two telescoping booms are extended from r1 = 1.18 m to r2 = 4.69 m at a constant rate over a period of 124 seconds. the small 19-kg experiment modules at the ends of the booms may be treated as particles, and the mass of the rigid booms is negligible. determine the necessary thrust t for each jet as a function of time where t = 0 is the time when the telescoping action is begun. after you have the general expression for t, answer the questions. show work.