Which statement describes absolute and apparent brightness?

absolute brightness and apparent brightness are identical ways to describe the brightness of a star.

absolute brightness and apparent brightness change with the distance from the star to the observer.

absolute brightness depends on the distance from the star to the observer, whereas apparent brightness is always the same.

absolute brightness is the actual amount of light produced by the star, whereas apparent brightness changes with distance from the observer.

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

Steam is generated in a boiler of a cogeneration plant at 10 mpa and 450°c at a steady rate of 5 kg/s. in normal operation, steam expands in a turbine to a pressure of 0.5 mpa and is then routed to the process heater, where it supplies the process heat. steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. in this mode, no steam passes through a condenser, which operates at 20 kpa. (a) determine the power produced in the turbine and the rate at which process heat is supplied in this mode. (b) determine the power produced in the turbine and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure. (3.32 mw; 9.69 mw; 4.25 mw; 5.82 mw)

Explain why you think this diagram shows what happened to the carbon in the biodome.