By reviewing the derivation of the virial theorem, write down the conditions necessary for an astronomical system to be "virialized" (i. e. - for the virial theorem to apply. based on these conditions, speculate on whether we should expect the milky way galaxy to be "virialized," that is, should we expect that today the total gravitational potential energy u and total kinetic energy k of the milky way obeys the relationship u-2k.

Abeverage can is made of 3004-h19 aluminum alloy (elastic modulus 69 gpa, tensile yield strength 285 mpa, density 2.72 g/cm^3). the dimensions on the can are approximated as a thin-walled cylinder with a height of 4.83 inches, diameter of 2.60 inches. empty the can has a mass of 14.2 g. determine: a. the wall thickness of the cylinder b. assuming a pinned-pinned condition what is the critical load? c. assuming a fixed-fixed condition what is the critical load?