Khan Academy: 2757 producten
Khan Academy is an organization on a mission. We're a not-for-profit with the goal of changing education for the better by providing a free world-class education for anyone anywhere.
All of the site's resources are available to anyone. It doesn't matter if you are a student, teacher, home-schooler, principal, adult returning to the classroom after 20 years, or a friendly alien just trying to get …
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Biology: Cytotoxic T cells and MHC I complexes
How damaged cells present antigens from inside the cell on MHC I and are recognized by cytotoxic T cells. Biology Life is beautiful! From a…
VideoGratis9 minuten
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Chemistry: Real vs ideal gas behavior
Ideal gas law assumptions, and when they break down. What happens to pressure and volume at low T and high P. Chemistry Did you know that e…
VideoGratis11 minuten
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Biology: CAM plants
How CAM Plants are able to fix carbon at night so they don't have to keep their stomata open during the day. Biology Life is beautiful! Fro…
VideoGratis9 minuten
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Cosmology and astronomy: Hawaiian islands formation
The Hawaiian Islands formed primarily as a result of volcanic activity. While most islands form near tectonic plate boundaries, the Hawaii…
VideoGratis8 minuten
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Organic chemistry: Optical activity calculations
How to calculate specific rotation and % enantiomeric excess Organic chemistry Sal and Jay cover topics covered in college organic chemistr…
VideoGratis8 minuten
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Cosmology and astronomy: Plate tectonics: Geological features of divergent plate boundaries
Plate Tectonics -- Geological Features of Divergent Plate Boundaries Cosmology and astronomy It's a great, big universe out there. In this …
VideoGratis12 minuten
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Biology: Photosynthesis: Overview of the light-dependent reactions
Overview of the light-dependent reactions, including the structure of the chloroplast, the photosystems, and how ATP is synthesized. Biolog…
VideoGratis20 minuten
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Chemistry: Balancing redox reactions in base
How to balance a redox reaction in base. Chemistry Did you know that everything is made out of chemicals? Chemistry is the study of matter:…
VideoGratis14 minuten
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Organic chemistry: Fischer projection introduction
How to assign a configuration to a chirality center using a Fischer projection Organic chemistry Sal and Jay cover topics covered in colleg…
VideoGratis9 minuten
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Biology: Light dependent reactions actors
More detailed description of the various molecular actors in the light dependent reactions. Biology Life is beautiful! From atoms to cells,…
VideoGratis7 minuten
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Cosmology and astronomy: Agriculture and human population
Thinking about how we get Calories from the land limits human population densities Cosmology and astronomy It's a great, big universe out t…
VideoGratis13 minuten
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Chemistry: Definition of pH
Introduction to pH and the pH scale. Examples of calculating pH of pure water, bleach, and orange juice. Chemistry Did you know that everyt…
VideoGratis12 minuten
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Chemistry: 2015 AP Chemistry free response 7
Energy necessary to recycle aluminum from aluminum oxide. From 2015 AP Chemistry free response 7. Chemistry Did you know that everything is…
VideoGratis6 minuten
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Cosmology and astronomy: Supermassive black holes
Supermassive Black Holes Cosmology and astronomy It's a great, big universe out there. In this section of Khan Academy, you'll learn about …
VideoGratis9 minuten
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High school biology: Welcome to the reproductive system
High school biology The reproductive system Topic: Science Learn about all the sciences, from physics, chemistry and biology, to cosmology …
VideoGratis7 minuten