Answer:
B) The lightbulb uses 4,104,000 J more than the stereo.
Chloroplast...................
The other 4 kg of mass may have departed the scene
of the fire, in the form of gases and smoke particles.
This is a "trick" question.
If the elevator is traveling at constant speed, it means it is at rest. This means anything inside the elevator traveling at constant speed, weights the same as in an elevator not moving -also at rest-.
So the 100N weight's weight doesn't change in an elevator traveling at constant speed.
