John went to the store to buy a lightbulb. At the store, he had the choice between a standard lightbulb 75 W and a LED bulb that gave off more light than the standard bulb. The LED bulb uses 6000 j of energy every 6 s. What is the power of the LED bulb?

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.