All Flashcards
What is the effect of external interactions on a system?
External interactions can change the total energy of a system.
What happens when positive work is done on a system?
The total energy of the system increases.
What happens when negative work is done on a system?
The total energy of the system decreases.
What is the effect of friction on a system?
Friction converts mechanical energy into thermal energy, often decreasing the kinetic energy of the system.
What happens when energy is transferred to a system?
The system's total energy increases.
What is the Law of Conservation of Energy?
Energy cannot be created or destroyed, only transformed.
Define a 'closed system' in thermodynamics.
A system that exchanges energy, but not matter, with its surroundings.
Define an 'open system' in thermodynamics.
A system that exchanges both matter and energy with its surroundings.
Define 'work' in physics.
The transfer of energy that occurs when an external force moves an object parallel to the force.
Define 'power' in physics.
The rate at which work is done or energy is transferred.
What is internal force?
Force caused by a member within the system.
What is external force?
Force caused by something outside the system.
What is the effect of doing positive work on a system?
The total energy of the system increases.
What is the effect of doing negative work on a system?
The total energy of the system decreases.
What happens when external interactions occur with a system?
The total energy of the system can change.
What happens when a force moves an object parallel to the force?
Work is done, and energy is transferred.