Energy Transfers P1 Flashcards
What is a closed system?
A closed system is one where no energy can enter from or escape to the surroundings.
What happens to the total energy in a closed system?
The total energy in a closed system never changes.
List the methods by which energy can be transferred.
- Heating
- Waves
- Electricity
- Forces (mechanical work)
How is energy transferred by heating?
Energy is transferred from one object to another object with a lower temperature.
What role do waves play in energy transfer?
Waves (e.g., light and sound waves) can transfer energy by radiation.
How does electricity transfer energy?
When an electric current flows, it can transfer energy.
What is the formula for kinetic energy?
Kinetic energy (J) = How much work is transferred per second.
What does the term ‘mechanical work’ refer to in energy transfer?
Energy is transferred when a force moves or changes the shape of an object.
Fill in the blank: Energy is transferred when a force moves or changes the shape of an _______.
[object]
