<span>The water is held behind a dam, forming reservoir. The force of the water being released from the reservoir through the dam spins the blades of a giant turbine.</span>
Answer:29.627 m
Explanation:
Given
Initial velocity of life preserver(u) is 1.6 m/s
it takes 2.3 s to reach the water
using equation of motion
v=u+at
![v=1.6+9.81\times 2.3](https://tex.z-dn.net/?f=v%3D1.6%2B9.81%5Ctimes%202.3)
v=24.163 m/s
Let s be the height of life preserver
![v^2-u^2=2gs](https://tex.z-dn.net/?f=v%5E2-u%5E2%3D2gs)
![24.163^2-1.6^2=2\times 9.81\times s](https://tex.z-dn.net/?f=24.163%5E2-1.6%5E2%3D2%5Ctimes%209.81%5Ctimes%20s)
![s=\frac{581.29}{2\times 9.81}](https://tex.z-dn.net/?f=s%3D%5Cfrac%7B581.29%7D%7B2%5Ctimes%209.81%7D)
s=29.627 m
Antoine-Laurent Lavoisier was the first person to report the four element classification system but also ended up including some compounds rather than elements.