The Virgo cluster is a fairly nearby cluster of ~2000 galaxies. The distance of the Virgo cluster is 16 Mpc and its bulk radial velocity is approximately 1120 km/s. The cluster is very large on the sky, its angular ‘core radius’ is approximately 6.5 degrees! a)(5 pts) If ~2.2% of Virgo galaxies have negativeradial velocities, what is the approximate mass of the cluster?

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

In order to do work, the force vector must be question 1 options: in a different direction than the acceleration vector. in a different direction than the displacement vector. in the same direction as the displacement vector and the motion. in the same direction as the acceleration vector.

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.