Thermal Energy Flashcards
Why doesn’t conduction work in a vacuum?
Absence of particles means no transfer of energy between particles for conduction
What happens to energy that is lost in a house?
It is dissipated into the atmosphere as heat
What are the energy changes taking place in a kettle?
Electric-heat
What are the energy changes taking place in a pendulum swinging back and forth?
GPE - kinetic
In what process does light energy become chemical energy?
Photosynthesis
What device turns sound energy into electrical energy?
Microphone
Cost effectiveness
Saving per year
x amount of years
- cost
Law of conservation of energy
Energy is not created or destroyed in any process
It is just converted from one type to another
Gravitational Potential energy
The energy an object has when lifted off the ground
Elastic potential energy/strain energy
The energy a stretched or squashed object has
Payback time
Cost of installation ➗ saving per year
