CIE A Level Physics复习笔记16.1.1 Internal energy
Defining Internal Energy Energy can generally be classified into two forms: kinetic or potential energy The molecules of all substances contain both kinetic and potential energies The amount of kin...
CIE A Level Physics复习笔记15.2.3 Average Kinetic Energy of a Molecule
Average Kinetic Energy of a Molecule An important property of molecules in a gas is their average kinetic energy This can be deduced from the ideal gas equations relating pressure, volume, temperat...
CIE A Level Physics复习笔记15.2.2 Derivation of the Kinetic Theory of Gases Equation
Derivation of the Kinetic Theory of Gases Equation When molecules rebound from a wall in a container, the change in momentum gives rise to a force exerted by the particle on the wall Many molecules...
CIE A Level Physics复习笔记15.2.1 Kinetic Theory of Gases
Assumptions of the Kinetic Theory of Gases Gases consist of atoms or molecules randomly moving around at high speeds The kinetic theory of gases models the thermodynamic behaviour of gases by linki...
CIE A Level Physics复习笔记15.1.3 Ideal Gas Equation
Ideal Gas Equation The equation of state for an ideal gas (or the ideal gas equation) can be expressed as: pV = nRT The ideal gas equation can also be written in the form: pV = NkT An ideal gas is ...
CIE A Level Physics复习笔记15.1.2 Ideal Gases
Ideal Gases An ideal gas is one which obeys the relation: pV ∝ T Where: p = pressure of the gas (Pa) V = volume of the gas (m3) T = thermodynamic temperature (K) The molecules in a gas move around ...
美国留学哪些专业就业前景好？
对于留学生来说，大学专业的选择几乎就决定了未来的发展方向，因此，收入前景好的专业总是备受青睐，比如每年都有无数学子为了毕业后令人羡艳的起薪，大家都愿意去学CS专业，然而对于有些专业来说，即使你付出了...
CIE A Level Physics复习笔记15.1.1 The Mole
Amount of Substance In thermodynamics, the amount of substance is measured in the SI unit ‘mole’ This has the symbol mol The mole is a unit of substance, not a unit of mass The mole is defined as: ...
CIE A Level Physics复习笔记14.2.2 Specific Latent Heat Capacity
Defining Latent Heat Capacity Energy is required to change the state of substance Examples of changes of state are: Melting = solid to liquid Evaporation/vaporisation/boiling = liquid to gas Sublim...
CIE A Level Physics复习笔记14.2.1 Specific Heat Capacity
Defining Specific Heat Capacity The specific heat capacity of a substance is defined as: The amount of thermal energy required to raise the temperature of 1 kg of a substance by 1 °C This quantity ...
CIE A Level Physics复习笔记14.1.4 The Kelvin Scale
Scale of Thermodynamic Temperature As an everyday scale of temperature, Celsius (oC) is the most familiar This scale is based on the properties of water - the freezing point of water was taken as t...
CIE A Level Physics复习笔记14.1.3 Measurement of Temperature
Measurement of Temperature A thermometer is any device that is used to measure temperature Each type of thermometer uses a physical property of a material that varies with temperature - examples of...
