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...
CIE A Level Physics复习笔记14.1.2 Thermal Equilibrium
Defining Thermal Equilibrium Thermal energy is always transferred from a hotter region to lower region Thermal equilibrium is defined as: When two substances in physical contact with each other no ...
CIE A Level Physics复习笔记14.1.1 Thermal Energy Transfer
Thermal Energy Transfer The conservation of energy states that energy is never created or destroyed, only transferred from one form to another When a thermometer is placed in a beaker of boiling wa...
CIE A Level Physics复习笔记13.2.2 Gravitational Potential Energy
Gravitational Potential Energy Between Two Point Masses The gravitational potential energy (G.P.E) at point in a gravitational field is defined as: The work done in bringing a mass from infinity to...
CIE A Level Physics复习笔记13.2.1 Gravitational Potential
Gravitational Potential The gravitational potential energy (G.P.E) is the energy an object has when lifted off the ground given by the familiar equation: G.P.E = mgΔh The G.P.E on the surface of th...
CIE A Level Physics复习笔记13.1.6 The Value of g on Earth
The Value of g on Earth Gravitational field strength g is approximately constant for small changes in height near the Earth’s surface (9.81 m s-2) This is because from the inverse square law relati...
