AQA A Level Maths: Pure复习笔记4.5.2 Sigma Notation
Sigma Notation What is sigma notation? The symbol Σ is the capital Greek letter sigma – that's why it's called 'sigma notation'! 'Σ' stands for 'sum' – the expression to the right of the Σ tells yo...
AQA A Level Maths: Pure复习笔记4.5.1 Language of Sequences & Series
Language of Sequences & Series What is a sequence? A sequence is an ordered set of numbers with a rule for finding all the numbers in the sequence The numbers in a sequence are called terms The...
IB DP Physics: SL复习笔记8.2.5 Earth's Surface–Atmosphere System
Earth's Surface–Atmosphere System It is useful to consider Earth’s energy balance in terms of how much incoming energy from the Sun is used and how much is returned to space If incoming and outgoin...
IB DP Physics: SL复习笔记8.2.4 The Greenhouse Effect
Greenhouse Gases When radiation from the Sun hits the Earth, it is radiated back from the Earth's surface as long-wave radiation A greenhouse gas is a gas that absorbs this re-radiated radiation, t...
IB DP Physics: SL复习笔记8.2.3 The Solar Constant, Albedo & Emissivity
The Solar Constant Since life on Earth is entirely dependant on the Sun’s energy, it is useful to quantify how much of its energy reaches the top of the atmosphere This is known as the solar consta...
IB DP Physics: SL复习笔记8.2.2 Black-Body Radiation
Black-Body Radiation Black body radiation is the name given to the thermal radiation emitted by all bodies (objects) All objects, no matter what temperature, emit black body radiation in the form o...
IB DP Physics: SL复习笔记8.2.1 Conduction, Convection & Thermal Radiation
Conduction, Convection & Thermal Radiation Thermal energy transfers from hotter areas to cooler areas by the processes of: Conduction Convection Radiation Objects will always lose heat until th...
IB DP Physics: SL复习笔记8.1.6 Safety Issues in Nuclear Power
Safety Issues in Nuclear Power Safety Measures for Workers Several measures are in place to reduce the worker’s exposure to radiation The fuel rods are handled remotely ie. by machines The nuclear ...
IB DP Physics: SL复习笔记8.1.5 Energy Generation
Energy Generation You need to know about the main ways of generating electricity: The equipment involved The advantages and disadvantages Calculate power obtained for different setups These revisio...
