The mechanical universe - 34 - magnetism .

Lesson 34: Magnets William Gilbert, personal physician by appointment to her Majesty Queen Elizabeth I of England, discovered that the earth behaves like a giant magnet. Magnetism as a natural phenomenon, the behavior of magnetic materials, and the motion of charged particles in a magnetic field.

Instructional Objectives

* Be able to calculate the magnetic force on a current element and on a moving charge in a given magnetic field.
* Know the definition of torque and potential energy for a magnetic dipole.
* Be able to explain the concept of domains in ferromagnetic materials.
* Be able to use the definition of magnetic flux and discuss the significance of the result that the net magnetic flux out of a closed surface is zero.
* Be able to calculate the magnetic moment of a current loop and the torque exerted on a current loop in a magnetic field.
* Be able to discuss the magnetism of the Earth.

This series helps teachers demystify physics by showing students what it looks like. Field trips to hot-air balloon events, symphony concerts, bicycle shops, and other locales make complex concepts more accessible. Inventive computer graphics illustrate abstract concepts such as time, force, and capacitance, while historical reenactments of the studies of Newton, Leibniz, Maxwell, and others trace the evolution of theories.

The Mechanical Universe helps meet different students' needs, from the basic requirements of liberal arts students to the rigorous demands of science and engineering majors. This series is also valuable for teacher professional development. Produced by the California Institute of Technology and Intelecom.


Caltech: The Mechanical Universe - 34 - Magnetism.

Dan Gilbert: Why are we happy? Why aren't we happy?

In this memorable talk, Dan Gilbert demonstrates just how poor we humans are at predicting (or understanding) what will make us happy. Gilbert is a psychology professor at Harvard, and author of "Stumbling on Happiness".

Dan Gilbert: Why are we happy? Why aren't we happy?

Dr Who - Adventures in time and space.

A documentary on the complete history of Doctor Who, originally broadcast as part of the BBC's "Doctor Who Night" in 1999.

Here is a list of all who played Doctor Who;

# First Doctor, played by William Hartnell (1963–1966)
# Second Doctor, played by Patrick Troughton (1966–1969)
# Third Doctor, played by Jon Pertwee (1970–1974)
# Fourth Doctor, played by Tom Baker (1974–1981)
# Fifth Doctor, played by Peter Davison (1981–1984)
# Sixth Doctor, played by Colin Baker (1984–1986)
# Seventh Doctor, played by Sylvester McCoy (1987–1989, 1996)
# Eighth Doctor, played by Paul McGann (1996)
# Ninth Doctor, played by Christopher Eccleston (2005)
# Tenth Doctor, played by David Tennant (2005–)

Other actors have also played the Doctor, though rarely more than once.

Adventures in time and space.

Race: The power of an illusion.

Race is one topic where we all think we're experts. Yet ask 10 people to define race or name "the races," and you're likely to get 10 different answers. Few issues are characterized by more contradictory assumptions and myths, each voiced with absolute certainty.

We felt it was important to go back to first principles and ask, What is this thing called "race?" - a question so basic it is rarely raised. What we discovered is that most of our common assumptions about race - for instance, that the world's people can be divided biologically along racial lines - are wrong. Yet the consequences of racism are very real. (Larry Adelman)

Race: The power of an illusion.

Richard Dawkins vs. John Lennox..

Oxford biologist and renowned atheist Richard Dawkins debates Oxford mathematician and Christian apologist John Lennox on the existence of God.

Richard Dawkins vs. John Lennox.

Patent for a pig.

As a powerful corporate giant attempts to patent living genetic material, this film asks what the consequences are for mankind.

Patent for a pig.

Death: Arguments for Existence of Soul.

This material was created by or adapted from material created by Yale faculty member, Shelly Kagan, Professor of Philosophy.

Death: Arguments for Existence of Soul.

John Pilger - War by other means.

John Pilger and David Munro examine the policy of First World banks agreeing loans with Third World countries, who are then unable to meet the cripling interest charges.

It won a Geneva International TV Award at the North-South Media Encounters event, Geneva, 1993;Gold Medal in the 'Best Documentary Production category' of the International Television Movie Festival, Mount Freedom, New Jersey 1993; Gold Award in the 'Political/International Issues category' at WorldFest-Houston (Houston International Film & Video Festival), 1993; Silver Hugo Award in the 'Documentary - Social/Political category' of the 29th Chicago International Film Festival, 1993.

John Pilger - War by other means.

Corruptocola.

Political activist and journalist Mark Thomas travels to South America, India and the US to investigate the way in which Coca-Cola and its suppliers operate and the extent to which they upholds moral and ethical obligations. Coca-Cola is one of the most iconic brands of both the 20th and 21st centuries. Promoting itself as the drink of freedom, choice and US patriotism, the company's feel-good factor is recognised worldwide and reflected in its enormous profits.

But behind this carefully crafted image exists a company accused of environmental damage, human rights violations and questionable business practices. Political activist and journalist Mark Thomas travels to South America, India and the US to investigate the way in which Coca-Cola and its suppliers operate and the extent to which they upholds moral and ethical obligations. Thomas, a long-term critic of Coca-Cola's more controversial practices, finds disturbing evidence which undermines its effervescent image as a force for good and which has prompted a global consumer backlash.

Corruptocola.

Stoned in Suburbia.

Stoned In Suburbia is a social history film, examining the change in people's opinions to cannabis over the past 50 years. Discussing the impact of the 60's sexual revolution, the Hippie movement, the emergence of the Punks right up until the modern day.

(Cannabis Users interviews UK 2005)

Stoned in Suburbia.

Alien contact.

Documentary about SETI, watch entire video and please leave comments. This will be of interest to anybody intriged by topics like aliens, UFO's, space, extraterestrials, nasa, science, society, unexplained and the paranormal. Alternatively anyone curious about a possible future.(Richard Hoagland, George Noory, Jim Marrs, Art Bell, Billy Meier). I prefer to stay skeptic on this one.

Alien contact.

Nanotechnology.

The power of molecular manufacturing – Nanotechnology – is huge. It has the potential to slow, stop, prevent or reverse aging. Yet, some fear that exploration in Nanotechnology may backfire and become a means of mass destruction. Is there a way to tap into the power of Nanotechnology without opening diabolical Pandora’s Box? Moderator: Morton Kondracke Moderator Guests: Robert G. Best, University of South Carolina Mike Treder, Center for Responsible Nanotechnology.

Nanotechnology: The promise of the future or Pandora’s Box?

Rageh inside Iran.

Rageh omar gives an insight of life inside Iran.

Rageh Omaar embarks on a unique journey inside what he describes as one of the most misunderstood countries in the world, looking at the country through the eyes of people rarely heard - ordinary Iranians.

It took a year of wrangling to get permission to film inside Iran but the result is an amazing portrayal of an energetic and vibrant country that is completely different to the usual images seen in the media.

Rageh inside Iran.

The curse of Oil.

Three-part series that goes on a revealing journey through the world's oil-producing regions, beyond the familiar territory of the Middle East. Nick Fraser Storyville Series Editor Now that the oil price appears to be rising inexorably at the pumps, newspapers are full of gloomy predictions related to our increasing addiction to perishable reserves of oil.

Bill Cran's series takes a somewhat different approach. We are in fact still amply supplied with oil on planet earth. The problem is that most of it lies in what we cosseted addicts regard as the wrong places. Getting enough oil to fill George Bush's SUV requires dealing with nasty governments or destroying the wilderness. But the relationship between oil companies, consumers and those who live where the oil is extracted is changing very rapidly. It is becoming possible for native populations to obstruct oil companies.

Cran's series leaves one with the feeling that there are no easy answers - but that, given the hysteria surrounding the subject, is no bad thing. It's also ravishingly shot.

The curse of Oil - Rich and Poor (1).


The curse of Oil - The pipeline.


The curse of Oil - The wilderness.

Sartre - The road to freedom.

An excellent documentary about the life and work of the Existentialist, Jean Paul Sartre.

Sartre - The road to freedom.

The death star.

Out in deepest space lurks a force of almost unimaginable power. Explosions of extraordinary violence, are blasting through the Universe every day. If one ever struck our Solar System it would destroy our Sun and all the planets.

For years no one could work out what was causing these awesome explosions. Now scientists think they have identified the culprit. It's the most extreme object ever found in the Universe; they have christened it a 'hypernova'.

The death star.

George Carlin - Life is worth losing.

This album is infamous for his "Owners of America" skit, wherein he spends a portion of his mic time explaining the way America works within a range of "wealthy business interests, that control everything and make all of the important decisions."

1. "A Modern Man"
2. "Three Little Words"
3. "The Suicide Guy"
4. "Extreme Human Behavior"
5. "The All-Suicide TV Channel"
6. "Dumb Americans"
7. "Pyramid Of The Hopeless"
8. "Autoerotic Asphyxia"
9. "Posthumous Female Transplants"
10. "Yeast Infection"
11. "Coast-To-Coast Emergency"

George Carlin - Life is worth losing.


Thnx for the jokes.

Earth's invisible shield.

The Earth's molten core creates a magnetic field that surrounds the globe, guarding against a constant barrage of deadly radiation from space. Over the last few decades, this field has weakened dramatically, intriguing scientists across the globe.

NOVA - Earth's invisible shield.

Deep sea.

Experience another IMAX film with fantastic footage from the deep. Narrated by Johnny Depp and Kate Winslet, creatures from the ocean floor are documented with the most advanced film from IMAX. Music by Danny Elfman.

IMAX Deep Sea (Full).

Obsessed & Scientific?

Is time travel possible? In this fascinating short documentary, director Jay Cheel explores the real-life theories behind the science of time travel and the strange subculture of enthusiasts who are obessed with it.

Meet Michio Kaku, world-renowned theoretical physicist and author of the book Hyperspace. Meet Rob Niosi, a hobbyist building his own full-scale home replica of H.G. Wells' time machine. Meet Larry Haber, the entertainment lawyer representing the family of John Titor, an alleged time traveller from the year 2036. Do these people know something about the world that the rest of us don't?

Obessed & Scientific is a quirky look at the intersection of science-fact and science-fiction.

Obsessed & Scientific?