Physics P1 - 7 Flashcards
During all energy transfers what happens to the energy eventually?
It is dissipated to heat in the surroundings
What are the energy transfers of a pendulum?
GPE -> KE -> GPE
What are the energy transfers of a car at constant speed?
Chemical -> Thermal energy
What are the energy transfers of a car breaking?
Kinetic -> Thermal energy
What do Sankey diagrams show?
The efficiency of a device
In a Sankey diagram what does the thickness of an arrow show?
It show the amount of energy and the arrow is also drawn to scale
What is thermal conductivity a measure of?
How quickly thermal energy is passed through a substance by conduction
When is more inferred radiation given off an object?
When the object is hotter
What are the advantages and disadvantages of coal?
\+ = Relatively cheap to mine, ready made fuels - = Non-renewable, burning produces CO2
What are the advantages and disadvantages of oil?
\+ = Short start-up time, ready made fuels - = Non-renewable, burning produces CO2
What are the advantages and disadvantages of gas?
\+ = Slightly cleaner fuel than oil and coal, is a ready made fuel - = Non-renewable, burning produces CO2
What are the advantages and disadvantages of nuclear power?
\+ = Produces lots of energy, doesn't produce CO2 - = Non-renewable, produces dangerous nuclear waste
What are the advantages and disadvantages of wind?
\+ = Renewable, no fuel costs - = No wind, sometime noisy
What are the advantages and disadvantages of hydroelectric?
\+ = Renewable, no fuel costs - = Can flood areas, disrupts habitats
What are the advantages and disadvantages of solar?
\+ = Renewable, no fuel costs - = No sun at night, some countries don't get enough sun in the day, panels are expensive
