Edexcel IGCSE Physics 復(fù)習(xí)筆記 4.1.3 Efficiency
Edexcel IGCSE Physics 復(fù)習(xí)筆記 4.1.3 Efficiency Efficiency The efficiency of a system is a measure of how well energy is transferred in a system Efficiency is defined as: The ratio of...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 4.1.2 Conservation of Energy
Edexcel IGCSE Physics 復(fù)習(xí)筆記 4.1.2 Conservation of Energy Conservation of Energy The principle of conservation of energy states that: Energy cannot be created or destroyed, it can o...
IB DP Maths: AI SL復(fù)習(xí)筆記5.1.1 Introduction to Differentiation
Introduction to Derivatives Before introducing a?derivative, an understanding of a?limit?is helpful What is a limit? What might I be asked about limits? You may be asked to use your GDC to plot the...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 4.1.1 Energy Stores & Transfers
Edexcel IGCSE Physics 復(fù)習(xí)筆記 4.1.1 Energy Stores & Transfers Energy Stores & Transfers Energy can be stored in different ways, and there are changes in the way it is stored when a ...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 3.3.4 Pitch & Loudness
Edexcel IGCSE Physics 復(fù)習(xí)筆記 3.3.4 Pitch & Loudness Pitch The?pitch?of a sound is related to the?frequency?of the vibrating source of sound waves If the?frequency?of vibration is?high,...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 3.3.3 Core Practical: Using an Oscilloscope
Edexcel IGCSE Physics 復(fù)習(xí)筆記 3.3.3 Core Practical: Using an Oscilloscope Core Practical 7: Using an Oscilloscope Aim of the Experiment The aim of this experiment is to investigate the freq...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 3.3.2 Sound & Oscilloscopes
Edexcel IGCSE Physics 復(fù)習(xí)筆記 3.3.2 Sound & Oscilloscopes Sound & Oscilloscopes An?oscilloscope?is a device that can be used to study a rapidly?changing?signal, such as: A?sound?wav...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 3.3.1 Core Practical: Investigating the Speed of Sound
Edexcel IGCSE Physics 復(fù)習(xí)筆記 3.3.1 Core Practical: Investigating the Speed of Sound Core Practical 6: Investigating the Speed of Sound Equipment List Resolution?of measuring equipment: Tru...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 3.2.6 Total Internal Reflection
Edexcel IGCSE Physics 復(fù)習(xí)筆記 3.2.6 Total Internal Reflection Total Internal Reflection Sometimes, when light is moving from a denser medium towards a less dense one, instead of being refracted, a...
22年AP全部科目5分率解析！
今年的AP考試可謂是一波三折，大陸地區(qū)一些城市由于疫情AP考試取消。盡管如此，全球AP考試依然進(jìn)行，AP成績也在最近公布分?jǐn)?shù)，我們?yōu)榇蠹覅R總了今年38門考試中，20余門熱門AP科目5分率與去年的對比變化。 1AP生物...
IB DP Maths: AI SL復(fù)習(xí)筆記4.7.4 The t-test
Two-Sample Tests What is a?t-test? A?t-test is used to?compare the means?of?two normally distributed?populations In the exam the?population variance will always be unknown What assumptions are need...
IB DP Maths: AI SL復(fù)習(xí)筆記4.7.3 Goodness of Fit Test
Chi-Squared GOF: Uniform What is a chi-squared goodness of fit test for a given distribution? What are the steps for a chi-squared goodness of fit test for a given distribution? Worked Example Chi-...
