4) A certain Cluster Of Stars has the following
Characteristics:
•It is made up of a few thousand young blue
Stars.
• These Stars are well spread out.
• The Cluster seems to have no definite order or shape
What Could this Cluster be?
A) An open Cluster
B) A spiral Galaxy
C) A globallar Cluster
D) An elliptical galaxy

10 kg of co2 is initially contained at 400 kpa and 300 k. the gas constant for carbon dioxide is 189 j/lkg k) and has a specific heat ratio, k, of 1.289. isentropic expansion then occurs until the pressure is 200 kpa. a) determine the initial volume of co2 in m. b) determine the final temperature in k. c) determine the work done by the system during the expansion kl.