Collar a starts from rest at t = 0 s and moves downward with a constant acceleration of 7 in./s2 . collar b moves upward with a constant acceleration, and its initial velocity is 8 in./s. knowing that collar b moves through 20 in. between t = 0 s and t = 2 s, determine (a) the accelerations of collar b and block c, (b) the time at which the velocity of block c is zero, (c) the distance through which block c will have moved at that time

Laboratory experiments, observational field studies, and model-building are all examples of different forms of scientific investigations.  in what way do laboratory experiments primarily differ from other forms of scientific investigations?   a.  a laboratory experiment is the only accepted form of investigation within the scientific community.  b.  studies about how things behave in nature or studies involving very large objects are best answered through laboratory experiments.  c.  laboratory experiments involve the identification and control of variables.  d.  data can only be generated through laboratory experiments, not other forms of investigation.

Which is not one of the major climate zones? question 3 options: rain forest polar tropical temperate

Which lists the fundamental forces in order, from strongest to weakest? strong nuclear, weak nuclear, electromagnetic, gravitational strong nuclear, electromagnetic, weak nuclear, gravitational gravitational, weak nuclear, electromagnetic, strong nuclear electromagnetic, gravitational, strong nuclear, weak nuclear