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.

The energy released by a chemical reaction can be measured using a calorimeter. when barium hydroxide octahydrate crystals are reacted with dry ammonium chloride inside of a coffee cup calorimeter, the temperature of the 18.00 g of water in the calorimeter decreases from 30.0°c to 8.0°c. the equation for calculating energy absorbed or released by a reaction is: where q is the energy released or absorbed, m is the mass of water in the calorimeter, cp is the specific heat of water, and δt is the observed temperature change. if the specific heat of liquid water is 4.19 j/g·°c, how much energy was absorbed by the reaction?

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

How much force was applied to an object if was moved 2 meters and the work done on the object was 8 joules? a. 0.25 n b. 4 n c. 6 n d. 16 n