Electrical Potential Difference

The work done to move a positive test change from one location to another.

1. V=W/q

2. E=v/d

 

Interaction between charges

• Electric Field is the space around an electrical charge just like a gravitational field is the space around a mass.  Clulomb´s law- Gives the electric force between two point charges 

F=K qi-q2/r2 

Here’s an example: https://www.youtube.com/watch?v=3HjtT2Sa7hE

Latent Heat

Latent heat (Joules/kg)

• Of fusion: The amount of energy required to change a unit mass of  a substence from solid to liquid
• Of vaporisation: The amount of energy required to change a unit mass of a substance from liquid to gas

Regelation

The process of melting under pressure and the subsequent refreezing when the pressure is removed.

a)Radiation: Transfer of heat through electromagnetic waves.

b)Convection: Heat energy is distributed by the liquid or gaseous molecules in circling currents

c) Conduction: Transmission of heat from particles to particle