1 - Energy
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/25
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai |
|---|
No analytics yet
Send a link to your students to track their progress
26 Terms
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 snergy can be transferred, stored or dissipated but never created or destroyed
elastic potential energy
the store of energy that stretched or compressed objects experience.
fossil fuels
non-renewable enrgy sources such as coal, oil or gas
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
joule
the unit used for energy
kinetic energy
the store of energy that all moving matter has
power
the rate at which energy is transferred, or work is done
a renewable enrgy source
an energy soruce that can be replenished whilst being used e.g. solar/ wind
specific heat capacity (ΔE = mcΔθ)
the amount of energy required to raise the temperature of 1kg of substance by 1 degree celsius
spring constant
the measure of a spring’s stiffness
system
a single or group of objects
waste energy
energy that isn’t usefully used for the purpose of the system
watt
the unit for power
work done
the energy transferred when a force acts over a distance
internal energy
the total energy stored by the particles making up a substance or system
which two stores is internal energy comprised of
kinetic + potential
where does conduction primarily take place in
solids
how does conduction work
As the solid is heated, its particles gain kinetic energy. This means that they move around faster and collide with the other particles. This process repeats over and over again so that energy is effectively passed along the object from one particle to the next. Thermal energy is being transferred through this conduction process.
What is convection
Convection is the transfer of heat in a fluid, where the hotter fluid is less dense, and so rises above the colder fluid. If the heat source is at the bottom of the fluid, this can create a convection current.
Where does convection occur
Fluids
What are fluids
substances where particles are free to move around, such as liquids and gases.
Do hotter or cooler objects emit more infrared radiation
Hotter, as they have more energy to emit
What type of radiation is infrared radiation
Electromagnetic radiation
What can infrared radiation travel through
A vacuum
What is geothermal energy
It is the the energy generated and stored in the Earth. The geothermal energy of the Earth's crust originates from the original formation of the planet and the radioactive decay of materials like uranium deep in the Earth.
