Answer:
An electron has a negative electric charge.
Answer:
The digestive system provides nutrients to the body by breaking down food.
It might be 144.2 m but i’m not for sure:)
If you're using the bulb as a source of light, then it's. 14/60 = 23.3% efficient.
If you're using it to heat a bird nest or a hamster cage, then it's. 46/60 = 76.7% efficient !
It just depends on your point of view, and what you consider 'useful' output.