Kinetic and potential energy are defined as combinations of more basic quantities: position, velocity and mass. These combinations are chosen so that their sum is conserved. It’s actually remarkable that there’s any such combination of...

In the search for the genes that make us human, some of the most important answers were hiding not in the genes themselves, but in what was once considered genomic junk.

In this video Paul Andersen explains how matter and energy are conserved within the Earth's system. Matter is a closed system and Energy is open to the surroundings. In natural systems steady state is maintained through feedback loops...

Conservation laws are among the most important tools in physics. They feel as fundamental as you can get. And yet they're wrong - or at least they're only right sometimes. These laws are consequences of a much deeper, more fundamental...

In this video Paul Andersen shows conceptual thinking in a mini-lesson on the conservation of matter.


TERMS
Matter - physical
substances
Atoms - the basic un
it of elements
Conservation - the quantity of a...

In this video Paul Andersen explains how systems are two or more objects that interact with one another. If a system has no relevant internal structure it can be treated as an object. The conservation laws apply to energy, charge and...

In this video Paul Andersen explains how linear momentum is conserved in all collisions. In completely elastic collisions the kinetic energy of the objects is also maintained. Several examples and demonstrations are included.

In this video Paul Andersen explains how the energy, charge, and momentum in a system is conserved over time.

In this video Paul Andersen introduces electric charge. Electric charge has been studies by humans and was generalized by scientists such as Benjamin Franklin. The amount of charge in a system is conserved but individual charges can move...

Paul Andersen describes three main characteristics of life that are conserved in all organisms on the planet. The universal genetic code, the central dogma of biology, and shared metabolic pathways give us details of the original...

In this video Paul Andersen explains how matter and energy flow and cycle through systems. He starts by explaining how energy and matter input and output will always be conserved. He addresses the many misconceptions surround energy...

In this video Paul Andersen explains how the boundary between the system and environment is chosen to simplify analysis of a physics problem.

Mr. Andersen explains the concept of momentum. He also shows you how to solve simple momentum problems. He finally shows you how momentum is both conserved and relative.

In this video Paul Andersen explains how energy can neither be created nor destroyed but may be transferred. Energy comes in many forms (including chemical, mechanical, light, electrical, and thermal). In AP Chemistry students must be...

The capacity of a system or a body to do work.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...

Find out the different ways an asteroid's energy is transformed.
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Physical processes - Energy and energy transfer - Energy
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Learning Points /

> There are many types of...

Whether we look at the mass, Mr or number of atoms, the mass is always conserved in chemical reactions. However, it may sometimes appear as if the mass changes if some of our reactants or products are gases. We can fix this problem...

Conservation of energy is used to determine the final speed of a proton released at rest in a uniform electric field.

Here is a quick math heavy proof of the conservation of mechanical energy in a 2 dimensional system. The proof in 3 dimensions is the exact same. Notice that the definition of the potential in the one dimensional...

The general energy transfer equation is introduced and used to derive work due to nonconservative forces equals change in mechanical energy and conservation of mechanical energy. Want Lecture