Conservation of Energy Flashcards
Gravitational Potential Energy equation
Change in GPE = Mass (kg) x Gravitational Field Strength (n/kg) x vertical height (m)
The Value of GPE depends on
mass of the body
height of the body is raised
gravitational field strength
Gravitational Potential Energy (GPE)
is the energy possessed by a body due to its height above the earth
Several Factors (energy use)
World’s population
Development of Technology
electrical energy
Patterns and trends in energy use
The Use of energy resources has changed over time
Non-Renewable energy sources
Nuclear fuels- Uranium
Fossil Fuel- coal, oil, and natural gas
Renewable energy sources
bio-fuel cells
solar cells
Hydroelectricity
Tidal Power
wind turbines
Thermal Conductivity
Thermal conductivity will determine how fast the thermal energy is transferred
Thermal energy transfer
difference in temperature
thickness of walls
Efficient Heat transfer
The efficiency of a device is a measure of how much useful energy it transfers
Type of energy transfers
mechanically- by a force moving through a distance
electrically- use of electric current
thermally- difference in temperature
radiation- waves such as electromagnetic
Closed System
is one where energy can flow in or out of the system
no transfer of mass
Electrostatic energy (examples)
two charges
thunderclouds
nuclear energy (examples)
radioactive decay
kinetic energy (examples)
moving objects
