Two different rivers have drops that are the same height. In river A, this drop of the river is a waterfall. In river B, this drop has the generator for a hydroelectric dam. In what way does the energy of the water differ between the drops in the two rivers?(1 point)

Question

Responses

The potential energy of the water would be less at the top of the drop in the waterfall river A than at the hydroelectric dam in river B.
The potential energy of the water would be less at the top of the drop in the waterfall river A than at the hydroelectric dam in river B.

The potential energy of the water would be greater at the top of the drop in the waterfall river A than at the hydroelectric dam in river B.
The potential energy of the water would be greater at the top of the drop in the waterfall river A than at the hydroelectric dam in river B.

The kinetic energy of the water would be less at the bottom of the drop in the waterfall river A than at the hydroelectric dam river B.
The kinetic energy of the water would be less at the bottom of the drop in the waterfall river A than at the hydroelectric dam river B.

The kinetic energy of the water would be greater at the bottom of the drop in the waterfall river A than at the hydroelectric dam in river B.

Answer 1

The correct response is:

The kinetic energy of the water would be less at the bottom of the drop in the waterfall river A than at the hydroelectric dam river B.

In river A (the waterfall), the water falls freely, and thus its kinetic energy at the bottom will be greater as it converts potential energy to kinetic energy. However, in river B (the hydroelectric dam), the water is being controlled and directed by turbines, which convert some of the water's kinetic energy into electrical energy. Therefore, the kinetic energy at the base of river B would be less than that at river A, assuming both drops are of the same height.

Answer 2

The turbines can be seen inside this hydroelectric dam. Why are they located at that particular height?

(1 point)
Responses

There is a large drop, so the water will have a lot of potential energy to transfer to the turbine.
There is a large drop, so the water will have a lot of potential energy to transfer to the turbine.

There is a small drop, so the water will still have a lot of kinetic energy to transfer to the turbine.
There is a small drop, so the water will still have a lot of kinetic energy to transfer to the turbine.

There is a small drop, so the water will still have a lot of potential energy to transfer to the turbine.
There is a small drop, so the water will still have a lot of potential energy to transfer to the turbine.

There is a large drop, so the water will have a lot of kinetic energy to transfer to the turbine.

Answer 3

The correct response is:

There is a large drop, so the water will have a lot of potential energy to transfer to the turbine.

Turbines in a hydroelectric dam are located at a height where there is a significant drop in water level. This large drop allows the water to have a substantial amount of potential energy, which is converted into kinetic energy as it falls, providing the energy needed to turn the turbines and generate electricity.

Answer 4

A team of engineers is working with a wind turbine. The team is working with a model and testing different angles for the blade of the wind turbine. What would the research question be for this team?(1 point)
Responses

Which angle converts the largest percentage of potential energy from the wind into kinetic energy of the turbine?
Which angle converts the largest percentage of potential energy from the wind into kinetic energy of the turbine?

Which angle converts the largest percentage of kinetic energy from the wind into potential energy of the turbine?
Which angle converts the largest percentage of kinetic energy from the wind into potential energy of the turbine?

Which angle converts the largest percentage of potential energy from the wind into potential energy of the turbine?
Which angle converts the largest percentage of potential energy from the wind into potential energy of the turbine?

Which angle converts the largest percentage of kinetic energy from the wind into kinetic energy of the turbine?

Answer 5

The correct response is:

Which angle converts the largest percentage of kinetic energy from the wind into kinetic energy of the turbine?

Wind turbines operate by converting the kinetic energy of moving air (wind) into mechanical energy, which is then transformed into electrical energy. Therefore, the research question should focus on how different blade angles impact the conversion of wind's kinetic energy into the kinetic energy that drives the turbine.