Topic 1 - Energy Flashcards
(9 cards)
Closed System
A system that experiences no net change in its total energy
when energy transfers occur within it.
Conservation of Energy
The law that energy can be transferred, stored or
dissipated but never created or destroyed.
Efficiency
The ratio of useful output energy transfer to total energy input.
Elastic Potential Energy
The store of energy that stretched or compressed
objects experience. It is directly proportional to the stiffness constant and to the
square of the extension or compression
Gravitational Potential Energy
The store of energy that all raised matter has. It
is directly proportional to the mass of the object, the distance that it is risen and
the gravitational field strength at that point.
Kinetic Energy
The store of energy that all moving matter has. It is directly
proportional to the object’s mass and to the square of its velocity.
Power
The rate at which energy is transferred, or at which work is done.
System
A single, or group, of objects
Thermal Conductivity
The higher this value is for a given material, the higher the
material’s rate of energy transfer via conduction will be.
