After the Chernobyl Disaster, researchers have been studying the movement of radioactive contamination all over central Europe. Fortunately, that radioactive contamination is decreasing in just about every living thing, except for one...

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...

In this video Paul Andersen explains how object interactions can add or remove mass or energy from a system.

In this video Paul Andersen shows conceptual thinking in a mini-lesson on boundary and initial conditions within systems.

Boundary conditions - the dividing line between system and enviro
nment
Initial condition - the...

With the same humor and humanity he exuded in "An Inconvenient Truth," Al Gore spells out 15 ways that individuals can address climate change immediately, from buying a hybrid to inventing a new, hotter brand name for global warming.

Today we continue our exploration of the Water Cycle by drinking some dinosaur pee. Yep! Well, it's a little less gross that it sounds. It turns out that all of the water on Earth is just constantly recycled in what we call a closed...

Now that we've discussed blood, we're beginning our look at how it gets around your body. Today Hank explains your blood vessels and their basic three-layer structure of your blood vessels. We're also going over how those...

In this video Paul Andersen explains how the second law of thermodynamics applies to reversible and irreversible processes. In a reversible process the net change in entropy is zero. In and irreversible process the entropy will always...

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

Paul Andersen describes how free energy is used by organisms to grow, maintain order, and reproduce. A brief discussion of the first and second law of thermodynamics is also included. Disruptions in the amount of free energy can cause...

In today’s episode we’ll explore thermodynamics and some of the ways it shows up in our daily lives. We’ll learn the zeroth law of thermodynamics, what it means to reach a thermal equilibrium, and define the first law of thermodynamics....

In this video Paul Andersen explains how the energy in a closed system can be converted from kinetic to potential to kinetic energy. Sample problems and a simulation is contained.

In this video Paul Andersen explains how intermolecular forces differ from intramolecular forces. He then explains how differences in these forces account for different properties in solid, liquids and gases. Some of these properties...

In this video, we’re exploring the link between information and entropy, by examining a famous thought experiments by James Clerk Maxwell, called Maxwell's demon, which seems to show that entropy can be reversed. In...

Certain mathematical equations contain unnerving dangers, Arguably, E=mc^2 is the most famous equation in science. C is a very large number. But in Einstein’s, equation it is squared. This means that mass contains an insane...

Evolution is inherited change in a population of organisms over time resulting in appearance of new forms, under the influence of pressure from the environment. Note changes are in populations not individual...

SUMMARY

The law of energy conservation may be the most fundamental law in physics. It says that overall energy is always conserved. It can never be created nor destroyed - it can only change form. But this law...

SUMMARY

The second law of thermodynamics states that overall entropy of any isolated system can never decrease. Entropy is a measure of the disorder in a system (roughly). However, living things don’t seem to...

Are you the only conscious mind? Are you the one? Does the universe revolve around you? Solipsism philosophy is scary. The science of Solipsism is presented here. From your point of view, the only sentience...

We make a Cartesian diver using a drinking straw and sticky tack. When the diver is placed in a sealed bottle of water it can be controlled by squeezing and releasing the bottle, which makes it rise and fall within the water. Physics -...

This video covers:

- Conservation of energy princ
iple
- Open vs close
s systems
- Examples of how energy

is transferr
ed

General info:
- Suitable f

or all GCSE and IGCSE cou
rses

Exam board...

This video is a lecture presentation on the principle of conservation of momentum. It explains the concept of conservation of momentum and applies it to various situations, including collisions and cutting a piece of string between two...

This video is a lecture presentation on the topic of conservation of momentum in physics. It explains the principle of conservation of momentum and how it can be used in calculations. The video provides examples of collisions between...

The video focuses on the concept of energy dissipation and how it occurs in various systems. It begins by explaining the principle of conservation of energy and then goes on to provide examples of closed and open systems. The video then...