Please help I will mark brainliest

My favorite instrument is the trumpet . the sound waves it gives off basically bounces off the sides of the trumpet from the hair that you blow into it , and then the sound waves it other objects and come back to your ears

12 brushing your teeth is sound energy that affects you its importent because it helps to understand how sound works

Explanation:

3500j

0.250 kg

14.14 m/s

220500 j

93.91 m/s

Explanation:

K.E =1/2 m v^2

first question

1/2×700×10=3500 j

second question

2×78.2/25^2= 0.250 kg

Third question

8kj=8000j

root (2×8000/80)= 14.14 m/s

Last one

P.E=MGH

so it will be

P.E=50×450×9.8=220500 j

the speed

root (2×220500/50)=93.91 m/s