Hydroelectric dams work by blocking the path of a water source to create an area with water held back by the dam. The dam can then be opened to allow water to be released.. The energy from the moving water is used and transformed into electrical energy. What type of energy does a hydroelectric dam capture as the water passes through?(1 point)
The type of energy that a hydroelectric dam captures as the water passes through is kinetic energy.
What type of energy does a hydroelectric dam capture as the water passes through?(1 point)
The type of energy that a hydroelectric dam captures as the water passes through is mechanical energy.
An oven is being used to bake cookies in this house. What energy transformations occur when baking cookies in this house?
When baking cookies in an oven, the following energy transformations occur:
1. Electrical energy from the power source is converted into heat energy through the heating element of the oven.
2. The heat energy is transferred to the air and surfaces inside the oven, raising their temperatures.
3. The cookies and the baking tray absorb the heat energy from the oven, causing the water content in the cookies to evaporate.
4. The evaporation of water transfers heat energy from the cookies, leading to their internal temperature increase and cooking.
5. The heat energy is further transferred from the oven to the surrounding environment, usually through convection or radiation.
6. Finally, when the cookies are removed from the oven, they release heat energy to the atmosphere until they reach room temperature.
The total amount of energy in the universe never changes, but the availability of each different type of energy to do work can change tremendously. What best explains this change in available energy?(1 point)
The best explanation for the change in available energy is the second law of thermodynamics, specifically the concept of entropy. Entropy is a measure of the disorder or randomness in a system. According to the second law of thermodynamics, the entropy of an isolated system tends to increase over time. As a result, energy is dispersed and becomes less available to do work. In other words, the energy in the universe remains constant, but its ability to do useful work decreases as entropy increases.
The total amount of energy in the universe never changes, but the availability of each different type of energy to do work can change tremendously. What best explains this change in available energy? (1 point)
A.) Energy is regularly changing from one form into another
B.) Energy can only be created through nuclear reactions.
C.) Energy can only be transferred as heat.
D.) Energy is always converted with 100 percent efficiency.
The correct answer is A.) Energy is regularly changing from one form into another.
An oven is being used to bake cookies in this house. What energy transformations occur when baking cookies in this house? (1 point)
A.) heat energy → light energy → chemical energy
B.) heat energy → chemical energy → light energy
C.) heat energy → electrical energy → chemical energy
D.) light energy → electrical energy → heat energy