What is the standard unit for elastic potential energy?
Joules
What is the equation to work out kinetic energy?
0.5 x mass x speed squared
What is the equation for gravitational potential energy?
mass x gravity x height
What is the equation that links power, energy transferred and time?
energy / time
efficiency
useful output / input
potential difference
current x resistance
electrical power
potential difference x current
electrical power
current squared x resistance
energy transferred
charge flow x potential difference
What is the standard unit for kinetic energy?
Joules
What is the standard unit for spring constant?
Newtons per metre (N/m)
What is the standard unit for extension in the elastic potential energy equation?
What is the standard unit for gravitational field strength?
N/kg
What is the standard unit for Specific Heat Capacity?
Joules per kilogram per degree Celisius
What is defined as: The amount of energy required to raise the temperature of 1kg of a substance by 1 degree Celsius
Specific Heat Capacity
What is defined as the rate at which energy is transferred or work is done?
Power
What is the standard unit for Power?
Watts
An energy transfer of 1 Joule per second is equal to a power of?
1 Watt
If 2 electric motors both lift the same height by the same height, which will do it faster, the lowest or the highest powered motor?
highest powered motor
Energy can be transferred, stored or dissipated, but cannot be...?
destroyed
In what type of system is there no net change to the total energy?
closed system
What are the 3 main types of fossil fuels?
oil, coal, natural gas
What are the main issues with burning fossil fuels?
carbon dioxide is a greenhouse gas, linked with climate change. Sulfur dioxide may cause acid rain. Finite supply of fossil fuels (will run out).
Name the main non-renewable energy resources
fossil fuels, nuclear fuel.
Name 6 renewable energy resources
Wind, Solar, Tidal, Hydro-electricity, Geothermal, Biofuel, Water waves.
What type of resource is one that is being replenished as it is being used?
renewable
What is required for a current to flow through a closed circuit
a potential difference
What is defined as the rate of flow of electrical charge
Electric current
What is the equation for charge in terms of current and time?
current x time
What are the standard units for current?
Amps
What is the standard unit for charge?
Coulombs
What is the standard unit for time?
seconds
