The rotating systems shown in the figure are identical. In the left system, identical movable masses are positioned a distance R from the axis of rotation while in the right system, these masses are positioned a distance R/2 from the axis of rotation. You release the identical hanging blocks simultaneously from rest, and call tL the time taken by the block on the left and tR the time taken by the block on the right to reach the bottom, respectively. The bar, pulley, and rope have negligible mass, the rope does not slip, and there is no friction in the axle of the pulley. Under these conditions, what is tR/tL?

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.

What are chlorofluorocarbons and what impact do they have on the atmosphere?

An object moves from the position +34m to the position -15m in 15 seconds. what is it's total displacement? what is it's average velocity?