physics Flashcards
(27 cards)
Elastic deformation
When an object returns to its original shape
Inelastic derformation
When the object will not return to its original shape
Hooke’s Law
Up to a certain force, the extension of a stretched object such as a spring is directly proportional to the force applied.
Linear elastic distortion formula
F = k x X
Elastic limit
Point where Hooke’s Law stops and the spring begins to distort inelastically
Work done by distortion formula
E = 1/2 x K x X2
Density
Amount of mass in a volume.
Density formula
P = m/v
Kinetic theory
Explains why particles behave the way they do.
Solid
- Strong forces of attraction
- Held together in fixed position
- Particles dont move
- closely packed together
Liquid
- Some forces of attraction
- Close together
- Free to move
- No definite shape
- Constantly flowing over each other
Gas
- No forces of attraction
- Far apart
- Can move in all directions
- Fast movement
Changing internal energy
Heating transfers energy to the particles kinetic store so the internal energy increases
Absolute zero
-273
Specific latent heat
Amount of energy required to change the state of 1kg substance without raising its temperature
Specific latent heat formula
Q = m x l
Solid to liquid
Melting
Liquid to gas
Evaporation
Gas to solid
Deposition
Liquid to solid
Freezing
Gas to liquid
Condensation
Solid to gas
Sublimation
Specific heat capacity
How much energy is needed for something to heat up
Specific heat capacity formula
^Q = m x c x ^0
