52.10 Which best explains how and why scientific knowledge is continually expanded and improved?
The scientific process flows in one direction and finds only facts that support a scientist's original idea.
O The scientific process is cyclical so that new facts inspire questions that lead to new studies.
Once explanations are found to be true, they do not need to be questioned; then scientists can stop studying the
topic.
Once facts are found through experiments and observations, other scientists do not need to repeat the experiments.
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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.