Thermal Energy And Nuclear Power Flashcards
(25 cards)
What is the definition of Thermal Energy
The movement of particles: fast moving = more thermal energy, slow moving = less thermal energy
Definition of Heat
The amount of thermal energy in or out
Equation for Heat
Q = change in thermal energy
What is heat capacity
Energy required to raise a substance 1 degree Celsius (1 kg)
What is latent heat?
A change in state
What are the two types of latent heat?
Fusion: melting/freezing, vaporization: or condensation (condensing)
What are the two types of latent heat?
Fusion: melting/freezing, vaporization: or condensation (condensing)
What is the equation for a change in temp?
Q= m c (change in) T
“m cat”
M=mass (kg)
C = heat capacity (given)
T = temp ( final-initial)
What is the equation for latent heat?
mL
M=mass(kg)
L = latent heat (given)
Unit for latent heat?
Joules / kilogram
What are three motions of particles?
Translation= moving direction
Rotation= turn
Vibrating = oscillating
Three types of radiation:
- Alpha radiation
- Beta radiation
- Gamma radiation
Alpha can’t penetrate…
Tissue/paper
Beta can’t penetrate…
Aluminum foil
Gamma can’t penetrate…
Lead
Which radiation is the most dangerous?
Alpha radiation
What is nuclear fission?
Uranium is an unstable element. It’s nucleus breaks apart, this is nuclear fission
Uranium is the largest or smallest element on earth?
Largest
What is half-life?
Refers to the time it takes for half the elements atoms to undergo radioactive decay.
Half-life equation ( + variable meanings ):
N= Ao (0.5) t/h
N=final amount
Ao = starting amount
T = total time
H = half-life
What is temperature?
Average kinetic energy of the particles
3 types of transfer…
- Radiation
- Conduction
- Convection
What is radiation?
Electromagnetic waves travelling through no specific medium
Example: UV rays from the sun
What is conduction?
Hear transferred through a solid
example: metal
