P1-ENERGY

Created by

abcd

Cards (23)

What is a system?
object or group of objects
What happens when a system changes?
there are changes in the way energy is stored
What is the diagram called used to show energy distribution?
sankey
What is the equation for kinetic energy?
1/2 x mass x ( speed )^2
What is the symbol equation for kinetic energy?
1/2 x m x v^2
What is kinetic energy?
energy of motion of an object
What is GPE?
energy gained by raising an object above ground level
What is the equation for GPE?
mass x gravitational field strength x height
What is elastic energy?
energy stored in a stretched or compressed spring/object
What is the equation for elastic energy?
0.5 x spring constant x ( extension )^2
What is the symbols equation for elastic energy?
0.5 x k x e^2
What is internal energy?
total kinetic and potential energy of all the particles that make up a system
What increases energy stored in a system?
doing work
What does temperature increase depend on?
mass, what the substance is and energy input
What is specific heat capacity?
amount of energy required to raise temperature of 1Kg of the substance by 1 degrees c
What is the equation for specific heat capacity?
m c ΔT. (mass x specific heat capacity x change in temp )
What can energy be?
transferred usefully, stored or dissipated
Energy cannot be….
created or destroyed
What is wasted energy caused by? 
unwanted energy trnasfers
How can unwanted transfers be reduced?
lubrication
tightening of loose parts
insulation
What does rate of cooling depend on?
thickness of walls
thermal conductivity of walls
What are the main uses of energy resources?
transport
electricity generation
heating
State whether each are non-renewable or renewable.
biofuel- renewable
wind- renewable
water (hydro-electricity)- renewable
coal- non-renewable
geothermal- renewable
oil and gas- non-renewable
tidal- renewable
nuclear fuel- non-renewable
solar- renewable
water waves- renewable