T1 Energy

Created by

Jenessa Anton

Cards (33)

What is specific heat capacity?
The energy required to raise the temperature of 1kg of a substance by 1 degree C
What is the equation for specific heat capacity?
energy = mass x shc x temperature change
What is specific latent heat?
The amount of heat energy required to change the state of a substance without changing its temperature
What is the equation for specific latent heat?
Thermal energy for a change in state = mass x slh
What is power? 
The rate at which energy is transferred or the rate at which work is done
What is the conservation of energy?
Energy can be transferred usefully, stored or dissipated but cannot be created or destroyed
How can you reduce energy waste by lubrication?
Oil in a motor which reduces friction so less energy is lost through friction
How can you reduce energy waste through thermal insulation?
Double glazing so less useful thermal energy is lost
What is thermal conductivity? 
The ability of a material to conduct heat from its one side to the other
What is efficiency? 
The ratio of the useful work done by a machine, engine, device, to the energy supplied to it
How can the efficiency of a system be increased? 
Reducing waste output, recycling waste output
What are renewable energy sources?
Biofuel, wind, hydroelectricity, geothermal, tidal, solar, water waves
What are non-renewable energy sources?
Fossil fuels (coal, oil, natural gas) and nuclear fuel
What is renewable energy?
Never run out
What is non-renewable energy? 
Runs out
What is an open system? 
Allows the exchange of energy and matter to or from its surroundings
What is a closed system? 
Can exchange energy but no matter to or from its surroundings
What is an isolated system?
Doesn't allow the transfer of matter of energy to or from its surroundings
What is kinetic energy? 
The amount of energy an object has a result of its mass and speed
What is gravitational potential energy? 
The energy an object has due to its height in a gravitational field
What is elastic potential energy?
The energy stored in an elastic object when work is done on the object
How can energy be transferred?
Heating by particles, heating by radiation, mechanical work done by forces, electrical work done when a current flows
How does energy transfers by heating increase energy in kinetic store?
Energy transfers by heating increase the energy in the kinetic store of the particles that make up that system, which increases the energy in the thermal store of the object
What is magnetic energy?
The energy stored in a magnetic field
What is thermal energy?
The energy that comes from the movement of particles within a substance
What is chemical energy?
The energy stored in chemical bonds such as those between molecules
What is electrostatic energy?
The potential energy stored in a system of charged particles due to their positions and interactions
What is nuclear energy? 
The energy stored in the nucleus of an atom
What is mechanical work?
A force moving an object through a distance
What is electrical work?
Charges moving due to a potential difference
What is radiation? 
The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization
What is heating? 
Transfer of energy
What is energy dissipation?
Energy transferred out of a system due to non-conservative force