Why are the turbines for hydroelectric dams located far below the top of the dam?
1. to ensure that the water does not lose too much potential energy before reaching the turbines.
2. to allow the potential energy of the water to increase greatly before reaching the turbines.
3. to reduce the amount of water pressure on the turbines.
4. to reduce the amount of noise generated by the turbines.
Answer: 1. to ensure that the water does not lose too much potential energy before reaching the turbines.