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IB Physics Topic 8.2: Thermal energy transfer - Part 2
To conclude energy production, this video discusses the energy balance between the Earth and the Sun. It reviews the factors involved and how small amounts of radiation is amplified by greenhouse gases and the greenhouse effect. It then ends on a practice question involving important calculations for your exam!
00:00 Introduction
00:31 Earth's energy balance
00:53 Solar constant
02:54 Factors of solar intensity
04:54 The greenhouse effect
05:52 Process of the greenhouse effect
05:55 Preview finished!
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IB Physics Topic 8.2: Thermal energy transfer - Part 14:29IB Physics Topic 8.2: Thermal energy transfer - Part 1
IB Physics Topic 8.2: Thermal energy transfer - Part 1
Переглядів 2397 місяців тому
This video introduces the methods of thermal energy transfer, including: conduction, convection, and radiation. It then focuses on black body radiation and how this relates to temperature and wavelength. Next, it focuses on albedo and emissivity in non-black bodies, before ending on a practice question. 00:00 Introduction 00:23 Thermal energy transfer methods 00:41 Conduction 01:23 Convection 0...
IB Physics Topic 8.1: Energy sources6:03IB Physics Topic 8.1: Energy sources
IB Physics Topic 8.1: Energy sources
Переглядів 967 місяців тому
This video starts with the properties of energy sources, including renewability, energy production capability, and conversion status via Sankey diagrams. Following this, various energy sources are discussed in detail, including fossil fuels, nuclear power, wind turbines, hydroelectric power, and finally, solar power. 00:00 Introduction 00:22 Types of energy sources 00:47 Energy production capab...
IB Physics Topic 7.3: The structure of matter6:55IB Physics Topic 7.3: The structure of matter
IB Physics Topic 7.3: The structure of matter
Переглядів 1147 місяців тому
This video commences with the concept of the standard model of matter and the creation of antimatter. It then dives into each component in depth, starting with bosons, then leptons and quarks, followed by how quarks form hadrons. The video concludes on how to draw and recognise Feynman diagrams. 00:00 Introduction 00:32 The standard model 01:07 Elementary & composite particles 01:57 Quantum num...
IB Physics Topic 7.1 & 7.2: Discrete energy and radioactivity & nuclear reactions - Part 26:53IB Physics Topic 7.1 & 7.2: Discrete energy and radioactivity & nuclear reactions - Part 2
IB Physics Topic 7.1 & 7.2: Discrete energy and radioactivity & nuclear reactions - Part 2
Переглядів 887 місяців тому
This video begins by discussing nuclear decay and calculating half-life. It then moves on to discuss the types of decay and their effect on the body. It follows to discuss nuclear reactions and their relation to mass defect via the nuclear binding energy. It ends with important safety considerations when surrounded by radiation. 00:00 Introduction 00:27 Nuclear decay 00:56 Radioactivity 01:46 H...
IB Physics Topic 7.1 & 7.2: Discrete energy and radioactivity & nuclear reactions - Part 15:20IB Physics Topic 7.1 & 7.2: Discrete energy and radioactivity & nuclear reactions - Part 1
IB Physics Topic 7.1 & 7.2: Discrete energy and radioactivity & nuclear reactions - Part 1
Переглядів 1567 місяців тому
This video starts by introducing the progression of atomic models from Democritus to Bohr. It then discusses electron energy levels on the basis of absorption and emission spectra. After this, atomic structure is discussed, including the forces and notation before finishing with the concept of nuclides. 00:00 Introduction 00:31 Atomic models 01:17 Rutherford-Geiger-Marsden experiment 02:04 Bohr...
IB Biology Topic 11.4 (HL): Sexual reproduction - Part 25:48IB Biology Topic 11.4 (HL): Sexual reproduction - Part 2
IB Biology Topic 11.4 (HL): Sexual reproduction - Part 2
Переглядів 2,3 тис.Рік тому
This video starts off where the last video finished, and covers all concepts past internal fertilisation. This begins with blastocyst development, then implantation of the embryo, and then its development into a foetus and formation of the placenta. Then, placental structure and function is explained. The video finishes by looking at the process of childbirth and comparing the gestational perio...
IB Biology Topic 11.4 (HL): Sexual reproduction - Part 16:12IB Biology Topic 11.4 (HL): Sexual reproduction - Part 1
IB Biology Topic 11.4 (HL): Sexual reproduction - Part 1
Переглядів 4,3 тис.Рік тому
This video covers the gamete production process, starting with oogenesis, the production of egg cells. Next it delves into spermatogenesis, the production of sperm cells, and the structure of both egg and sperm cells. Following this, internal and external fertilisation are discussed. The video concludes on the process of internal fertilisation. 00:00 Introduction 00:32 Oogenesis 01:58 Summary o...
IB Biology Topic 11.3 (HL): The kidney & osmoregulation - Part 25:04IB Biology Topic 11.3 (HL): The kidney & osmoregulation - Part 2
IB Biology Topic 11.3 (HL): The kidney & osmoregulation - Part 2
Переглядів 3,1 тис.Рік тому
This video delves into the detailed processes of osmoregulation by the kidneys. It moves in a sequential order from solute absorption in the proximal convoluted tubule to water absorption in the loop of Henlé and fine-tuning of both by the distal convoluted tubule and collecting duct, respectively. It then moves on to discuss dehydration and over hydration, and ends on by covering the diagnosis...
IB Biology Topic 11.3 (HL): The kidney & osmoregulation - Part 16:15IB Biology Topic 11.3 (HL): The kidney & osmoregulation - Part 1
IB Biology Topic 11.3 (HL): The kidney & osmoregulation - Part 1
Переглядів 5 тис.Рік тому
This video first reviews the concept of homeostasis, and relates this to osmoregulatory and osmoconformers. It then delves into how fish, mammals, and birds excrete their nitrogenous waste. This is followed by a detailed explanation of how this occurs in arthropods via their Malpighian tubules. Then, the foundation of how this occurs in mammals is set up by introducing kidney structure. The vid...
IB Biology Topic 11.2 (HL): Movement5:54IB Biology Topic 11.2 (HL): Movement
IB Biology Topic 11.2 (HL): Movement
Переглядів 4,2 тис.Рік тому
This video begins to introduce the types of muscle and then delves into the third, skeletal muscle. It covers its macroscopic structure in detail, followed by the structure of its most basic unit, the sarcomere. This is followed by discussion of the process of sarcomere contraction. Next, the video explains how bones act as levers through examples of the grasshopper limb and human elbow. The vi...
IB Biology Topic 11.1 (HL): Antibody production & vaccination6:42IB Biology Topic 11.1 (HL): Antibody production & vaccination
IB Biology Topic 11.1 (HL): Antibody production & vaccination
Переглядів 6 тис.Рік тому
This video starts by reintroducing antigens and relating them to red blood cells. It then moves on to expand on antibody production and the primary functions of antibodies for HL students. Next, the concept of vaccines and how Edward Jenner pioneered them is discussed. After this, monoclonal antibodies are introduced, as well as their use in pregnancy tests and post-exposure vaccination. This v...
IB Chemistry Topic 20.3 (HL): Stereoisomerism - Part 25:58IB Chemistry Topic 20.3 (HL): Stereoisomerism - Part 2
IB Chemistry Topic 20.3 (HL): Stereoisomerism - Part 2
Переглядів 956Рік тому
This video begins by introducing the final configurational isomer, optical isomerism. It then teaches how to identify chiral carbons in non-cyclic and cyclic compounds. Next, it covers how multiple chiral carbons in one molecule create diastereomers. To conclude, the video discusses the rotation of light by enantiomers and how this is used experimentally. 00:00 Introduction 00:30 Optical isomer...
IB Chemistry Topic 20.3 (HL): Stereoisomerism - Part 15:45IB Chemistry Topic 20.3 (HL): Stereoisomerism - Part 1
IB Chemistry Topic 20.3 (HL): Stereoisomerism - Part 1
Переглядів 1,6 тис.Рік тому
This video starts by reviewing the creation of isomers outlined in topic 10, before introducing atom rotation to produce conformational and configurational isomers. It follows on to discuss both linear and cyclic conformational isomers, and then configurational isomers in alkenes and substituted cycloalkanes. Here it focuses on cis/trans isomerism and E/Z isomerism, including examples. The vide...
IB Chemistry Topic 20.1 & 20.2 (HL): Types of organic reactions and synthetic routes4:38IB Chemistry Topic 20.1 & 20.2 (HL): Types of organic reactions and synthetic routes
IB Chemistry Topic 20.1 & 20.2 (HL): Types of organic reactions and synthetic routes
Переглядів 749Рік тому
This video starts by covering the final set of reactions involving benzenes. These include electrophilic substitution to form nitrobenzene, and the subsequent reduction to form phenylamine. It then delves into a difficult part of the HL syllabus: synthetic routes. Via several examples, the video ends by explaining how to systematically determine the reaction pathway to form any molecule. 00:00 ...
IB Chemistry Topic 20.1 (HL): Types of organic reactions - Part 27:32IB Chemistry Topic 20.1 (HL): Types of organic reactions - Part 2
IB Chemistry Topic 20.1 (HL): Types of organic reactions - Part 2
Переглядів 898Рік тому
IB Chemistry Topic 20.1 (HL): Types of organic reactions - Part 2
IB Chemistry Topic 20.1 (HL): Types of organic reactions - Part 16:02IB Chemistry Topic 20.1 (HL): Types of organic reactions - Part 1
IB Chemistry Topic 20.1 (HL): Types of organic reactions - Part 1
Переглядів 1,5 тис.Рік тому
IB Chemistry Topic 20.1 (HL): Types of organic reactions - Part 1
IB Chemistry Topic 10.2: Functional Group Chemistry - Part 26:10IB Chemistry Topic 10.2: Functional Group Chemistry - Part 2
IB Chemistry Topic 10.2: Functional Group Chemistry - Part 2
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IB Chemistry Topic 10.2: Functional Group Chemistry - Part 2
IB Chemistry Topic 10.2: Functional Group Chemistry - Part 17:02IB Chemistry Topic 10.2: Functional Group Chemistry - Part 1
IB Chemistry Topic 10.2: Functional Group Chemistry - Part 1
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IB Chemistry Topic 10.2: Functional Group Chemistry - Part 1
IB Chemistry Topic 10.1: Fundamentals of Organic Chemistry - Part 25:11IB Chemistry Topic 10.1: Fundamentals of Organic Chemistry - Part 2
IB Chemistry Topic 10.1: Fundamentals of Organic Chemistry - Part 2
Переглядів 2,5 тис.Рік тому
IB Chemistry Topic 10.1: Fundamentals of Organic Chemistry - Part 2
IB Chemistry Topic 10.1: Fundamentals of Organic Chemistry - Part 17:15IB Chemistry Topic 10.1: Fundamentals of Organic Chemistry - Part 1
IB Chemistry Topic 10.1: Fundamentals of Organic Chemistry - Part 1
Переглядів 4,9 тис.Рік тому
IB Chemistry Topic 10.1: Fundamentals of Organic Chemistry - Part 1
IB Chemistry Topic 21.1 (HL): Spectroscopic Identification8:21IB Chemistry Topic 21.1 (HL): Spectroscopic Identification
IB Chemistry Topic 21.1 (HL): Spectroscopic Identification
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IB Chemistry Topic 21.1 (HL): Spectroscopic Identification
IB Chemistry Topic 11.3: Spectroscopic Identification (Part 2)6:44IB Chemistry Topic 11.3: Spectroscopic Identification (Part 2)
IB Chemistry Topic 11.3: Spectroscopic Identification (Part 2)
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IB Chemistry Topic 11.3: Spectroscopic Identification (Part 2)
IB Chemistry Topic 11.3: Spectroscopic Identification (Part 1)6:14IB Chemistry Topic 11.3: Spectroscopic Identification (Part 1)
IB Chemistry Topic 11.3: Spectroscopic Identification (Part 1)
Переглядів 2,3 тис.Рік тому
IB Chemistry Topic 11.3: Spectroscopic Identification (Part 1)
IB Chemistry Topic 11.1 & 11.2: Uncertainties, Errors & Graphical Techniques7:09IB Chemistry Topic 11.1 & 11.2: Uncertainties, Errors & Graphical Techniques
IB Chemistry Topic 11.1 & 11.2: Uncertainties, Errors & Graphical Techniques
Переглядів 1,9 тис.Рік тому
IB Chemistry Topic 11.1 & 11.2: Uncertainties, Errors & Graphical Techniques
IB Physics Topic 6.2: Newton's Law of Universal Gravitation5:24IB Physics Topic 6.2: Newton's Law of Universal Gravitation
IB Physics Topic 6.2: Newton's Law of Universal Gravitation
Переглядів 661Рік тому
IB Physics Topic 6.2: Newton's Law of Universal Gravitation
IB Physics Topic 6.1: Circular Motion5:58IB Physics Topic 6.1: Circular Motion
IB Physics Topic 6.1: Circular Motion
Переглядів 1,7 тис.Рік тому
IB Physics Topic 6.1: Circular Motion
IB Physics Topic 5.4: Magnetic Effects of Electric Currents5:14IB Physics Topic 5.4: Magnetic Effects of Electric Currents
IB Physics Topic 5.4: Magnetic Effects of Electric Currents
Переглядів 540Рік тому
IB Physics Topic 5.4: Magnetic Effects of Electric Currents
IB Physics Topic 5.3: Electric Cells5:30IB Physics Topic 5.3: Electric Cells
IB Physics Topic 5.3: Electric Cells
Переглядів 327Рік тому
IB Physics Topic 5.3: Electric Cells
IB Physics Topic 5.1 & 5.2 (Part 2): Electric Fields & Heating Effects of Electric Currents5:31IB Physics Topic 5.1 & 5.2 (Part 2): Electric Fields & Heating Effects of Electric Currents
IB Physics Topic 5.1 & 5.2 (Part 2): Electric Fields & Heating Effects of Electric Currents
Переглядів 289Рік тому
IB Physics Topic 5.1 & 5.2 (Part 2): Electric Fields & Heating Effects of Electric Currents