Derived Units What are derived units? Derived units for quantities such as velocity, acceleration and force etc. are combinations of S.I. units Speed?or?Velocity?= distance ÷ time?=?m/s or m s-1?(V...
Fundamental Units What are fundamental units? Fundamental units?or?S.I. units?are the international standardised units used around the world The three main units you will be using are: Length?measu...
Scalars & Vectors Mechanics uses a variety of different scalar and vector quantities. What are scalars? Scalars?are quantities without direction, they only have a?size (magnitude) e.g. a?speed?...
Edexcel IGCSE Physics: Double Science 復習筆記：3.1.5 Electromagnetic (EM) Waves Properties of EM Waves Electromagnetic waves are defined as: Transverse waves that transfer energy fro...
Edexcel IGCSE Physics: Double Science 復習筆記：3.1.4 The Doppler Effect The Doppler Effect The?Doppler Effect?is defined as: The apparent change in wavelength and frequency of a wave...
Edexcel IGCSE Physics: Double Science 復習筆記： 3.1.3 The Wave Equation The Wave Equation All waves obey the?wave equation, which is used to calculate the?wave?speed: Where: v...
Edexcel IGCSE Physics: Double Science 復習筆記：3.1.2 Describing Wave Motion Describing Wave Motion When describing wave motion, there are several terms which are important to know, includin...
Edexcel IGCSE Physics: Double Science 復習筆記：3.1.1 Transverse & Longitudinal Waves Transverse & Longitudinal Waves Waves can exist as one of two types: Transverse Longitudinal &nb...
Edexcel IGCSE Physics: Double Science 復習筆記： 2.3.5 AC & DC AC & DC Direct Current A direct current (d.c.) is defined as A current that is steady, constantly flowing in the...
