1) Which statement correctly identifies the relative levels of kinetic and potential energy in a hydroelectric dam?(1 point)
Kinetic and potential energy are both highest at the top.
Kinetic energy is highest at the top; potential energy is highest at the bottom.
Kinetic energy is highest at the bottom; potential energy is highest at the top.***
Kinetic and potential energy are both highest at the bottom.
2)Two different rivers have drops that are the same height. In river A, this section of the river is a waterfall. In river B, this section has a hydroelectric dam. In what way does the energy differ between the drops in the two rivers?(1 point)
The kinetic energy of the water would be greater at the bottom of the drop in river A than in river B.
The potential energy of the water would be less at the top of the drop in river A than in river B.
The kinetic energy of the water would be less at the bottom of the drop in river A than in river B.***
The potential energy of the water would be greater at the top of the drop in river A than in river B.
3)The turbines can be seen inside this hydroelectric dam. Why are they located at that particular height?
(1 point)
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 large drop, so the water will have a lot of kinetic 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
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)
Which angle converts the largest percentage of kinetic 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 potential 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?
The research question for this team would be: "Which angle converts the largest percentage of kinetic energy from the wind into kinetic energy of the turbine?"
1) Kinetic energy is highest at the bottom; potential energy is highest at the top.
2) The kinetic energy of the water would be less at the bottom of the drop in river A than in river B.
3) There is a large drop, so the water will have a lot of kinetic energy to transfer to the turbine.
4) Which angle converts the largest percentage of kinetic energy from the wind into kinetic energy of the turbine?
1) The correct answer is: Kinetic energy is highest at the bottom; potential energy is highest at the top.
To arrive at this answer, we need to understand the concept of kinetic and potential energy in a hydroelectric dam. Kinetic energy refers to the energy of motion, while potential energy refers to stored energy. In the case of a hydroelectric dam, water is stored at a higher elevation (top), which gives it potential energy. When the water flows from the top to the bottom (into the turbines), its potential energy is converted into kinetic energy.
2) The correct answer is: The kinetic energy of the water would be less at the bottom of the drop in river A than in river B.
To determine the difference in energy between the drops in the two rivers, we need to compare the kinetic energy. Kinetic energy is proportional to the mass and velocity of an object. In this case, the water in river A experiences a free-fall drop, resulting in higher velocity and thus higher kinetic energy at the bottom. In river B, where there is a hydroelectric dam, the water is controlled and its velocity is reduced, resulting in lower kinetic energy at the bottom.
3) The correct answer is: There is a large drop, so the water will have a lot of kinetic energy to transfer to the turbine.
To understand why turbines are located at a specific height in a hydroelectric dam, we need to consider the principles of energy conversion. In a hydroelectric dam, water flows from a higher elevation (potential energy) to a lower elevation (kinetic energy). To maximize the energy transfer to the turbine, it is positioned at a location where the water has a high kinetic energy, which occurs when there is a significant drop or change in elevation. Thus, the turbines are located at a particular height to harness the high kinetic energy of the water falling from that height.
4) The correct answer is: Which angle converts the largest percentage of kinetic energy from the wind into kinetic energy of the turbine?
The research question for the team working with a wind turbine focuses on determining the optimal angle for the turbine blade to convert the maximum percentage of kinetic energy from the wind into kinetic energy of the turbine. This question emphasizes the conversion of kinetic energy, which refers to the energy of motion, from the wind into the rotating motion of the turbine, maximizing its efficiency.