Flashcards in P1: Energy Deck (18)
What is the law of conservation of energy?
No energy is created or destroyed but it is transferred
What is the gravitational potential energy?
The energy gained when raising an object above ground
Weight(N/kg)= mass(kg) x gravitational field (N) x height
Elastic potential energy
1/2 x spring constant(N/m) x extension(squared)(m)
Work done (j) = force(N) x distance
W= Fx s
Efficiency= useful output / total input x100
Fossil fuels= non-renewable
1/2 x mass(kg) x velocity (squared)(m/s)
Er= 1/2 x m x v^2
Insulating a building(2)
- Insulation reduces the amount of energy transfer by conduction.
- The lower the thermal conductivity of the insulating material and the thicker the layer the more the rate of energy transfer is reduced.
When energy is given out to the surroundings
The capture of energy produced at one time for use at a later time
The conservation to one type of energy to another form
What are biofuels?
Energy resources made by burning plants and also animal waste
Mechanical energy transfer:
To do with movement
What is an environmental problem caused by generating electricity using hydro-electro power?
It could result in a loss of habitat for some species
Some energy is always ........... when an electrical device is used
- Elastic potential
- Gravitational potential