Physics

Three processes of heat transfer

Conduction, convection, radiation

Specific heat capacity

The amount of energy required to raise the temperature of 1kg of a material by 1K

Binding energy

The mechanical work that must be done against the forces holding a nucleus together to disassemble it into its component parts.

SI standard unit for energy

Joules (J)

Concave lens

Thicker on outside, thinner in centre

Creates diverging rays

Negative focal length

Always virtual, upright and diminish regardless of objects position

Convex lens

Thinner on outside, thicker in centre

Creates converging rays

Can be real or virtual, inverted or upright, magnified or diminished

How is the uncertainty of the y-intercept or gradient processed

The uncertainty is rounded up to 1 significant figure and the y-int or gradient rounded off to match the decimal places of the uncertainty

Conduction

A process in which heat is transferred through stationary matter by physical contact due to a temperature difference between them.

Convection

A transfer of heat caused by the movement of particles within a fluid (liquid or gas) where the hotter (less dense) fluid rises and the colder (more dense) fluid sinks - carrying thermal energy.

Radiation

The transfer in energy in the form of electromagnetic waves, propagated at the speed of light in a vacuum. Transfers heat where no particles exist.

Convection current

The pathway in which fluid (liquid or gas) particles flow as they heat up (become less dense) and cool down (become more dense).