Physic Paper 1 Flashcards
What are the energy stores
Gravitational potential energy
Kinetic energy
Chemical energy
Thermal/internal energy
Elastic potential energy
Nuclear energy
Magnetic energy
Electrostatic energy
What is kinetic energy
Movement of an object
What is elastic potential energy
When an object is being stretched, compressed or squashed
What us thermal energy
A sum of kinetic and potential energy
What is chemical energy
Chemical bonds and atoms
What is gravitational potential energy
Object that is raised above earth surface
What is temperature in interal/thermal energy measure
Kinetic store on particle
When body temperature increases
Kinetic energy increases
Thermal energy increases
What is the kinetic energy calculation
Energy= 1/2 mass x velocity2
What to remember in kenetic energy
Mass - kg
Velocity- m/s
Energy- j (joules)
What is the gravitational potential calculation
Change in potential = mass x gravitational field strength x height
What is the number on acceleration (graitvational potential)
9.8 netwons/kg
What are the measurements in GPE calculation
Gravitational field strength - n/kg
Height - m
Mass - kg
Energy- j (joules)
What is the calculation of elastic potential
Elastic potential = 1/2 spring constant x extention2
What are the measurements of the calculation in elastic potential energy
Spring constant - n/m
Extension - m
Energy - joules
Give an example of how energy storing is like
1 ans - like a bank account. Earn money by doing WORK. Spend money (energy) on what u need and save money (energy) when it is not needed. Transfer money (energy) to someone else you are buying it from
2 ans - energy is added to bodies chemical energy store when eating food. Or kinetic energy to move around. Body transfer thermal energy to keep us warm. Energy is stored until you need it.
What is it meant by “useful energy”
Where Energy was supposed to go into
What is it meant by “useless energy”
enegry that is wasted and does not go to its intended purpose
what is another way of saying “wasted energy”
dissipated energy
What is the major waste of energy
Friction
what is thermal equilibrium
two objects that has an equal amount of heat transfer
which kind of materials are conductors
copper
iron
aluminium
graphite
carbon
water
when the material has a high thermal conductivity, the material ……………… ……………..
answer: heats up quickly
which kind of materials are insulators
air
steel
glass
bronze
rubber
In thermal conduction less energy is transferred when: (3 points)
-
-material is thicker
-material is an insulator
-the temperature difference is less than the orginal
in conservation and dissipation, enegery is wasted due to : (3 points)
-heating
-light
-sound
depending on the heat capacity- when the capacity is low….
it will heat up quickly
what is the equation for heat capacity
Q=m x c(change) T
