p1 - energy Flashcards
what is work
the amount of energy transferred, J
what is power
the rate at which work is done, W
what is the rate of cooling affected by
thickness and thermal conductivity
advantages of fossil fuels
efficient, reliable, cost effective
disadvantages of fossil fuels
non renewable, greenhouse gas emissions
advantages of wind turbines
renewable, doesn’t take up much space
disadvantages of wind turbines
expensive, often in remote locations
advantages of nuclear power
no greenhouse gas emissions, small land footprint
disadvantages of nuclear power
non-renewable, expensive
advantages of hydroelectric power
renewable, inexpensive in the long run
disadvantages of hydroelectric power
displaces people, limited resources
advantages of solar panels
renewable, cost effective, reliable
disadvantages of solar panels
won’t work if cloudy or at night
what is pressure
the force caused by particles colliding with any surface they come into contact with
how can you increase pressure
lowering volume, increasing temperature, increasing number of particles
in a gas, the higher the temperature the higher the….
kinetic energy
types of energy store
kinetic, magnetic, thermal, chemical, electrostatic, gravitational potential, elastic potential, nuclear
what is the law of conservation of energy
energy cannot be created or destroyed, only transferred
what is mechanical work
a force moving an object through a distance
what is electrical work
charges moving due to a potential difference
when is energy wasted
when it is transferred to the environment or less useful energy stores
what is the gravitational field strength on earth
9.8N/kg
what does the heat energy transferred depend on
mass, material, temp change desired
what is specific heat capacity
Specific heat capacity is the amount of energy needed to raise the temperature of 1 kg of a substance by 1 °C
