Revision : Thermodynamics. Formula sheet Thermodynamics key facts (1/9)

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Presentation transcript:

Revision : Thermodynamics

Formula sheet

Thermodynamics key facts (1/9)

Thermodynamics key facts (2/9)

Thermodynamics key facts (3/9)

Thermodynamics key facts (4/9) Conduction is heat energy transfer by direct molecular contact Heat transfer

Thermodynamics key facts (5/9) Convection is heat energy transfer by the bulk flow of material

Thermodynamics key facts (6/9) Radiation is heat energy transfer by emission of electromagnetic radiation

Thermodynamics key facts (7/9)

Thermodynamics key facts (8/9) Kinetic theory of ideal gas Pressure is due to molecular collisions Average kinetic energy of molecules depends on temperature

Thermodynamics key facts (9/9)

Practice exam questions: Section A Option B Option C

Practice exam questions: Section A Heat energy loss is by conduction – option B

Practice exam questions: Section A Reflects radiation – option A Fractional expansion is the same – option A

Practice exam questions: Section B

Practice exam questions: Section C

Next steps Make sure you are comfortable with unit conversions Review the thermodynamics key facts Familiarize yourself with the thermodynamics section of the formula sheet Try questions from the sample exam papers on Blackboard and/or the textbook

Revision : Electricity

Formula sheet

Electricity key facts (1/9)

Electricity key facts (2/9)

Superposition principle for Coulomb’s Law : if there are multiple charges, the forces from individual charges sum like vectors +ve

Electricity key facts (3/9) Positive charge feels force along electric field line Negative charge feels force the other way

Electricity key facts (4/9)

Electricity key facts (5/9) Same current flows through all components of a series circuit Same voltage is dropped over all components of a parallel circuit

Electricity key facts (6/9)

Resistances may be combined in series or parallel [R increases] [R decreases]

Electricity key facts (7/9)

Electricity key facts (8/9)

Electricity key facts (9/9) General circuits may be analysed using Kirchoff’s rules Signs are different for inward/outward current This rule arises from conservation of charge Kirchoff’s junction rule : the sum of currents at any junction is zero

Electricity key facts (9/9) Kirchoff’s loop rule : the sum of voltage changes around a closed loop is zero

Practice exam questions: Section A

Decreases – option B

Practice exam questions: Section B

Practice exam questions: Section C

Final words Thanks to all students for their efforts in the Introduction to Physics course Please fill in feedback surveys! Good luck in the upcoming exams!