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?
Sound energy
Light energy
Nuclear energy
Mechanical energy
The correct answer is Mechanical energy.
An oven is being used to bake cookies in this house. What energy transformations occur when baking cookies in this house?
light energy → electrical energy → heat energy
heat energy → chemical energy → light energy
heat energy → electrical energy → chemical energy
heat energy → light energy → chemical energy
The correct answer is heat energy → chemical energy → light energy.
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
The best explanation for the change in available energy is the concept of energy conversion or energy transformation. Energy can change from one form to another, but the total amount of energy in the universe remains constant. However, the availability of each type of energy to do work can change based on various factors, such as the efficiency of energy conversion processes, the degradation of energy into less useful forms (e.g., heat), and the ability to harness and utilize specific types of energy.
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?
Energy can only be created through nuclear reactions.
Energy is regularly changing from one form into another.
Energy is always converted with 100 percent efficiency.
Energy can only be transferred as heat.
The best explanation for the change in available energy is that energy is regularly changing from one form into another. While energy can be converted from one form to another, the total amount of energy in the universe remains constant according to the law of conservation of energy. However, the availability of each type of energy to do work can vary depending on various factors such as efficiency of energy conversion processes, degradation of energy into less useful forms (e.g. heat), and the ability to harness and utilize specific types of energy.
What is the energy transformation that occurs when a smoke alarm goes off?
electrical to potential
electrical to sound
potential to electrical
sound to light
The correct answer is electrical to sound. When a smoke alarm goes off, an electrical signal is sent to the alarm which then produces sound in the form of a loud alarm or beep to alert individuals of potential smoke or fire.
You are cooking pasta and putting a pot of water on an electric stove. When the water starts to boil, you add the pasta. What energy transformation occurs to cook the pasta?
nuclear energy to heat energy
heat energy to mechanical energy
electric energy to heat energy
mechanical energy to light energy