The right answer is "<span>B. durability and flexibility".</span>
Answer: P= W/t so P=50/20 =2.5 W
“The vibrations of the aluminum force the air Column inside of the rod to vibrate at its natural frequency. The match between the vibrations of the air column and one of the natural frequencies of the singing rod causes resonance.”
I think it’s “light energy to chemical energy” let me know if i’m wrong
