CIE A Level Physics复习笔记7.1.4 Wave Intensity
Wave Intensity Progressive waves transfer energy The amount of energy passing through a unit area per unit time is the intensity of the wave Therefore, the intensity is defined as power per unit ar...
CIE A Level Physics复习笔记7.1.3 The Wave Equation
Derivation of v = f λ Using the definitions of speed, frequency and wavelength, the wave equation v = fλ can be derived This is an important relationship between three key properties of a wave The ...
CIE A Level Physics复习笔记7.1.2 Cathode-Ray Oscilloscope
Cathode-Ray Oscilloscope A Cathode-Ray Oscilloscope is a laboratory instrument used to display, measure and analyse waveforms of electrical circuits An A.C. current on an oscilloscope is represente...
CIE A Level Physics复习笔记7.1.1 Progressive Waves
Wave Motion Energy is transferred through moving oscillations or vibrations. These can be seen in vibrations of ropes or springs Waves can be shown through vibrations in ropes or springs The oscill...
CIE A Level Physics复习笔记6.2.2 Elastic Potential Energy
Area under a Force-Extension Graph The work done in stretching a material is equal to the force multiplied by the distance moved Therefore, the area under a force-extension graph is equal to the wo...
CIE A Level Physics复习笔记6.2.1 Elastic & Plastic Behaviour
Elastic & Plastic Deformation Elastic deformation: when the load is removed, the object will return to its original shape Plastic deformation: when the load is removed, the object will not retu...
CIE A Level Physics复习笔记6.1.3 The Young Modulus
Stress, Strain & the Young Modulus Stress Tensile stress is the applied force per unit cross sectional area of a material Stress equation The ultimate tensile stress is the maximum force per or...
CIE A Level Physics复习笔记6.1.2 Hooke's Law
Hooke's Law A material obeys Hooke’s Law if its extension is directly proportional to the applied force (load) The Force v Extension graph is a straight line through the origin (see “Extension and ...
CIE A Level Physics复习笔记6.1.1 Extension & Compression
Tensile Force Forces don’t just change the motion of a body, but can change the size and shape of them too. This is known as deformation Forces in opposite directions stretch or compress a body Whe...
