QUESTION IMAGE
Question
- amrit swings a baseball bat and strikes a ball. when the ball hits the bat, it flies through the air in the opposite direction. what energy transfer takes place?
- for breakfast, mrs. burroughs makes toast using a toaster. what energy transformation takes place?
give two examples of each type of energy transformation.
electrical to thermal
radiant to electrical
electrical to mechanical
d turbines are is used to provide electricity to a town. louisa says the turbines create energy for the town. is she correct? why or why not?
ll game is on television. what form of energy is on display when a player runs up the field?
Step1: Analyze question 5
The bat has kinetic energy when it swings. When it hits the ball, kinetic - energy is transferred from the bat to the ball.
Step2: Analyze question 6
A toaster uses electrical energy to heat up and toast the bread, so it is electrical - to - thermal energy transformation.
Step3: Provide examples for energy transformations
Electrical to Thermal
- Electric kettle: It uses electricity to heat water, converting electrical energy to thermal energy.
- Electric stove: Electricity is used to generate heat for cooking, transforming electrical energy into thermal energy.
Radiant to Electrical
- Solar panels: They absorb radiant energy (sunlight) and convert it into electrical energy.
- Photocells in calculators: They convert light (radiant energy) into electrical energy to power the calculator.
Electrical to Mechanical
- Electric fan: Electrical energy is used to rotate the fan blades, transforming electrical energy into mechanical energy.
- Electric motor in a toy car: It uses electrical energy to make the car move, converting electrical energy into mechanical energy.
Step4: Analyze the turbines statement
Louisa is incorrect. Turbines do not create energy. According to the law of conservation of energy, energy cannot be created or destroyed. Turbines convert mechanical energy (e.g., from wind, water) into electrical energy.
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- Kinetic energy is transferred from the bat to the ball.
- Electrical energy is transformed into thermal energy.
Electrical to Thermal: Electric kettle, Electric stove.
Radiant to Electrical: Solar panels, Photocells in calculators.
Electrical to Mechanical: Electric fan, Electric motor in a toy car.
Louisa is incorrect. Turbines convert mechanical energy into electrical energy, they do not create energy.