165 results found for physics

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00:09:00

Sticky tape X-rays

by Carlos Camara
Sticky tape X-rays
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1557 views
Rating:

Peeling sticky tape emits energy that extends into the X-ray regime, reports a study in Nature. The research provides evidence for a phenomenon that was first observed more than 50 years ago.nnIt is well known that unwinding sticky tape produces spar....

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.....

Dark Matter, Dark Energy

by George Smoot
Dark Matter, Dark Energy
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 2843 views
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Smoot's Nobel Prize was awarded for his analysis of that whisper from the Big Bang, the cosmic microwave background radiation. Today he hopes CERN's data will again transform our understanding of the universe. Young scientists Bilge Demirkoz and Benj....

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00:06:00

The Quantum Lattice

by William Phillips
The Quantum Lattice
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1616 views
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Awarded a Nobel Prize for using lasers to control and cool atoms, producing the Bose-Einstein condensation, Bill Phillips is eager to hear about new theories from young scientists like Hannah Venzl. An exciting dialogue develops between them on a boa....

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00:06:00

Fibre and Sunlight

by John Hall
Fibre and Sunlight
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1648 views
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Fine tuning the frequencies of light gave John Hall a Nobel Prize, and helped transform the fields of precision measurement and information transmission. Iris Choi and Andrei Ghicov are young scientists excited by the ways physics can change our worl....

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00:06:00

Abolishing Time?

by David Gross
Abolishing Time?
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1865 views
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David Gross's Nobel Prize was for work on the 'strong' force which acts between quarks inside the atom. Now he works on string theory, hoping to understand how all the forces of nature could be united. He believes the next steps may involve throwing ....

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00:10:00

Momentum

by Joe Wolfe
Momentum
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1506 views
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p=mv. If external forces are zero, momentum is conserved. In collisions, energy may be conserved (elastic) or not (inelastic).

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00:07:00

Diffraction and Fourier Transforms

by Tega Edo
Diffraction and Fourier Transforms
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1818 views
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How we are affected by the very widespread manifesations of diffraction.

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00:10:00

Why can’t we see atoms?

by John Rodenburg
Why can’t we see atoms?
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1669 views
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John talks about diffraction and the limits it puts on our ability to image atoms. Can we make an electron-microscope without lenses?

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00:08:00

Centre of mass

by Joe Wolfe
Centre of mass
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1841 views
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In finite objects, the total external force equals the total mass times the acceleration of a point called the centre of mass.

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00:06:00

Improving your Memory

by Matthew Bryan
Improving your Memory
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1306 views
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Looking at how hard disk drives can be improvedn

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00:10:00

Energy and power

by Joe Wolfe
Energy and power
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1451 views
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The total work done on an object equals the increase in its kinetic energy. For conservative forces, we can define potential energy.

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01:28:00

The Physics of Angels and Demons

by Harrison Prosper
The Physics of Angels and Demons
for 14-19 and upwards,
Lectures | 14-19 and upwards | 14 years ago | 1299 views
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Professor Harrison Prosper of FSU Physics Department looks at the science behind the recently released movie 'Angels and Demons', starring Tom Hanks and based upon a Dan Brown novel. Prof. Prosper discusses topics such as antimatter, dark matter, dar....

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00:10:00

Weight and contact forces

by Joe Wolfe
Weight and contact forces
for 14-19 and upwards,
Lectures | 14-19 and upwards | 15 years ago | 1734 views
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Carefully distinguish mass and weight. Hooke's law quantifies deformation. Contact forces have normal and frictional components.

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00:55:00

The Quantum World abserver by Electron Waves

by Akira Tonomura
The Quantum World abserver by Electron Waves
for 18-22 and upwards,
Lectures | 18-22 and upwards | 15 years ago | 1771 views
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Dr. Tonomura is a world renowned pioneer and authority in the field of electron holography, for which he has received many national and international recognitions. He is recognized for his contributions in the development of electron holography, the ....

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00:05:00

Light Beam

by Jonathan Hare
Light Beam
for 14-19 and upwards,
Lectures | 14-19 and upwards | 15 years ago | 1944 views
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Light is reflected off a flexible shiny surface fixed to the end of a plastic tube. When one speaks into the tubes sound vibrations pass down the tube and make the surface vibrate. The reflected light is therefore sent off from the surface in a con....

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00:07:00

Potato Battery

by Jonathan Hare
Potato Battery
for 11-14 and upwards,
Lectures | 11-14 and upwards | 15 years ago | 2743 views
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When two different types of conductors are pushed into a potato chemical reactions take place charging them up - we have a simple electrochemical cell. A potato, zinc screw and carbon rod produce about 1V. We experiment joining a few of these cells u....

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00:04:00

Shake-a-Gen

by Jonathan Hare
Shake-a-Gen
for 11-14 and upwards,
Lectures | 11-14 and upwards | 15 years ago | 1734 views
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This is a simple yet effective demonstration of electricity generation. 500 turns of wire are wound onto a 35mm film can and the two ends are attached to an LED light. A strong magnet is placed in the can and the lid fixed back in place. The generato....

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00:04:00

Seawater Battery

by Jonathan Hare
Seawater Battery
for 11-14 and upwards,
Lectures | 11-14 and upwards | 15 years ago | 3159 views
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When two different metals are placed in a salt solution (an electrolyte) the chemistry produces a voltage. This is called a cell. By wiring up a number of these cells we can make a battery and use it to power electrical circuits.

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00:03:00

Three Windmills

by Jonathan Hare
Three Windmills
for 11-14 and upwards,
Lectures | 11-14 and upwards | 15 years ago | 1659 views
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Converting wind power into electricity seems like an ideal way of helping to solve our energy problems. However, the power generated by a windmill is dependent on the wind speed. If the wind drops to half its speed there is as little as an 1/8th of t....

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00:02:00

Parabolic Light Collectors

by Jonathan Hare
Parabolic Light Collectors
for 11-14 and upwards,
Lectures | 11-14 and upwards | 15 years ago | 6046 views
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Parabolic surfaces can be used to concentrate energy for example to focus sunlight to heat things. Using an old World War II spot light mirror we demonstrate how easy it it is to concentrate enough energy to cause combustion. Finally, we show how to ....

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00:04:00

Temperature and States of Matter

by John Murrell
Temperature and States of Matter
for 14-19 and upwards,
Lectures | 14-19 and upwards | 15 years ago | 9779 views
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A short video explaining how to measure temperature.

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00:10:00

Measuring Temperature

by John Murrell
Measuring Temperature
for 14-19 and upwards,
Lectures | 14-19 and upwards | 15 years ago | 1624 views
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00:10:00

Temperature Scales

by John Murrell
Temperature Scales
for 14-19 and upwards,
Lectures | 14-19 and upwards | 15 years ago | 1521 views
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John Murrell explains scales and colour changes with temperature, boiling and melting,

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00:01:00

Volume Changes with Temperature

by John Murrell
Volume Changes with Temperature
for 14-19 and upwards,
Lectures | 14-19 and upwards | 15 years ago | 1338 views
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