100 results found for physics

How we are affected by the very widespread manifesations of diffraction.

John talks about diffraction and the limits it puts on our ability to image atoms. Can we make an electron-microscope without lenses?

In finite objects, the total external force equals the total mass times the acceleration of a point called the centre of mass.

Looking at how hard disk drives can be improvedn

The total work done on an object equals the increase in its kinetic energy. For conservative forces, we can define potential energy.

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....

A short video showing a simple classroom method of checking the way in which this force is related to mass, speed and radius.

A presentation showing both the ideas about centripetal force and a simple classroom method of checking the way in which this force is related to mass, speed and radius.

A short clip showing the experimental measurement of the speed of electrical pulses in a cable - a large fraction of the speed of light.

A presentation showing how to measure the speed of sound over a short distance on a laboratory table.

Carefully distinguish mass and weight. Hooke's law quantifies deformation. Contact forces have normal and frictional components.

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....