Answer:
I world say A is the answer 80% sure
1 Is advantage because with out is. you couldn't carry the piano at all.
2 Efficiency because it is going against you.
<span>"prevent the engine from over speeding the armature"
hopes this help :) :D :)</span>
The mass is 10.811 hope this helps
The black means that it is a great emitter/absorber of the electromagnetic spectrum. The electromagnetic radiation is reflected of the white and absorbed nurture black meaning that the temperature of the black tarmac increases to that greater the the white
