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.

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative