I created a graph of tags from Stack Exchange sites (including Physics.SE), TagOverflow. I made an interactive version of Map of 64 Tags from Physics.SE, with always up-to-date data. Nodes represent the most popular tags, with their area being proportional to the number of questions with them....

Use below free body diagrams and note that $P_2=\rho gh_2$ and $h_2=h+y-x$ and y is lower piston displacement. Note that volume of the displaced water for 2 pistons are equal.

If I take a warm unopened aluminum can of Coca-Cola and place it in the freezer and let the Coca-Cola freeze solid, then take the can out of the freezer and let it thaw unopened in a typical room, the lid of the aluminum can will invert and be pushed upwards as much as approximately one inch abov...

I'm assuming that the answer to the question in the title is a resounding yes. Since Baryonic matter and dark matter interact via gravitational forces. If this is the case how is information not lost if, as is presumed, dark matter does not interact via the electromagnetic force?

My reasoning is as follows Atmospheric pressure = $P_{0}$; Spring stretch = $x$; Pressure under top piston = $P$ Balancing forces on top piston $kx + P S_1 = P_0 S_1$ Balancing forces on bottom piston $(P+h \rho g) S_2+ mg = P_0 S_2$ Solving the two equations gives $x= \frac{g S_1(m+h\rho S_2)}...