Which of the following best describes reverberation? A change in the sound wave velocity causes the wave to bend in a different
direction.
The wave fronts become mixed and broken up due to contact with a rough or
irregular surface.
A fraction of the sound waves are absorbed by an object and converted to heat
energy.
A single sound undergoes several reflections due to multiple reflecting surfaces.

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.