Detailed measurements of the disk and central bulge region of our galaxy suggest our milky way is a: select one: a. quasar. b. barred spiral galaxy. c. very flat elliptical galaxy. d. very dusty irregular galaxy. e. normal spiral galaxy.

What accounts for an increase in the temperature of a gas that is kept at constant volume? a. energy has been removed as heat from the gas. b. energy has been added as heat to the gas. c. energy has been removed as work done by the gas. d. energy has been added as work done by the gas.