You turn up the dimmer switch so that the temperature of the filament reaches 2600 degrees c. the light bulb filament has an area of 6.45 x 10-4 m2 (0.1 square inches) and an emissivity of 0.8. how much electrical power must it be using?

First answer marked as brainiest which is the correct equation describing the first law of thermodynamics? a) when the internal energy of a system changes, it equals the amount of heat added plus the work done. b) when work is done by the piston, it is equal to the heat added plus the change in internal energy of the system. c) when heat is added to the system, it is equal to the amount of work done by the piston plus the change in internal energy of the system.