Physics 1.1.1 Flashcards
What is a System in Physics?
An object or group of objects.
What happens to a System when it is in Equilibrium?
Nothing.
What happens when there is a change in a System?
Energy is Transferred.
Energy is measured in…
Joules. J.
Open System:
Allows for the exchange of Energy and Matter to or from its surroudnings.
Closed System:
Can exchange Energy but not Matter to or from its Surroundings.
Isolated System:
Does not allow the Transfer of Matter or Energy to or from its Surroundings.
What happens when a change happens within a System?
Energy is transferred between objects or between Stores.
Law of Conservation of Energy:
Energy cannot be Created nor Destroyed, only Transferred.
Due to the Law of Conservation of Energy, the total amount of Energy in a Closed System is…
Constant.
Name 5 Energy Stores:
-Kinetic.
-Gravitational.
-Elastic.
-Electrostatic.
-Magnetic.
-Chemical.
-Nuclear.
-Thermal.
How is Energy Transferred between Stores?
Via Transfer Pathways.
Name the 4 main Energy Transfer Pathways: (4)
-Mechanically.
-Electrically.
-By Heating.
-By Radiation.
Describe the Transfer Pathway ‘Mechanical Working’:
When a Force acts on an Object.
Describe the Transfer Pathway ‘Electrical Working’:
A Charge (Current) moving through a Potential Difference.
