the total energy for a closed system remains ___ - it is conserved over time
constant
1 of 14
energy can be stored, transferred usefully or...
dissipated (the lose energy over time - not usefully transferred [wasted energy]. e.g losing energy to surrounds)
2 of 14
can energy be created/destroyed?
no
3 of 14
for example, as a ball is swayed side to side (pendulum in a vacuum - no air resistance), it starts with x amount of ____ energy, being high in the air
gravitational energy
4 of 14
that same amount is transferred to ___ energy as it moves towards the center
kinetic energy
5 of 14
that same amount is then transferred to ___ energy once it lifts back up into the air
gravitational energy
6 of 14
there is no net change in this system. true?
yes
7 of 14
the pendulum in a vacuum is an example of a closed system. define a closed system
isolated system where no energy is transferred into/out of system
8 of 14
what force does an open system experience?
air resistence
9 of 14
what will happen to the energy in an open system?
it will be transferred in the air (it will dissipate into surroundings
10 of 14
energy dissipation can be reduced by lubrication. how does applying a lubricant reduce dissipation?
lubricant reduces energy loss that's caused by friction between the two surfaces
11 of 14
thermal insulation can also be used to reduce dissipation. explain what thermal insulation is
this is when material is used to reduce energy transfer to surroundings
12 of 14
a material with a higher thermal ____ will have a higher rate of energy transfer by conductivity across that material
conductivity
13 of 14
so material with high thermal conductivity will dissipate energy at a (slower/faster?) rate
faster
14 of 14
Other cards in this set
Card 2
Front
energy can be stored, transferred usefully or...
Back
dissipated (the lose energy over time - not usefully transferred [wasted energy]. e.g losing energy to surrounds)
Card 3
Front
can energy be created/destroyed?
Back
Card 4
Front
for example, as a ball is swayed side to side (pendulum in a vacuum - no air resistance), it starts with x amount of ____ energy, being high in the air
Back
Card 5
Front
that same amount is transferred to ___ energy as it moves towards the center
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