This diagram shows three balls of the same size, but differe…
This diagram shows three balls of the same size, but different masses, which are completely submerged at the same depth in an open container of water. Ball 1 is made of lead. Ball 2 is made of Styrofoam (the material pool floats are made of). Ball 3 is made of a plastic that has exactly the same density as water. (The balls are being held under the water, or supported in the water as necessary to keep them in the positions shown.) The next three questions deal with these three balls.
Read DetailsThe James Webb telescope, the Hubble successor that is due t…
The James Webb telescope, the Hubble successor that is due to launch shortly, is designed so that it folds up for launch and unfolds to a much larger size after it is released in space. It is shown in both its folded and unfolded configurations below. The James Webb will be rotating slightly when it is deployed in space. What will happen to its rotational speed as it unfolds to its larger size?
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