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Time lapse video of 3 ice cubes melting in a glass.

Water drips from leaf, slow motion

High-speed footage of a shot breaking a blue water-filled balloon outdoors.

Nuclear fission

A vena cava filter used to help prevent blood clots

RNA protein synthesis.

RNA protein synthesis. Footage by Stocktrek Images

Cloud Chamber showing radioactive decay by creating a layer of cold super-saturated isopropyl alcohol. The high energy atomic particle cause the vapor to condense to a trail.

Water moving in super slow motion under a blue light

Mature businessman looking at kinetic balls in office. Footage in high definition

Gloved hand pouring elemental mercury (Hg) into a dish. Mercury has the atomic number 80, and is the only metallic element that is a liquid at room temperature.

man looking bored playing with kinetic balls

Cloud Chamber showing radioactive decay by creating a layer of cold super-saturated isopropyl alcohol. The high energy atomic particle cause the vapor to condense to a trail.

A glass of clear ice cubes, and one with colored ice cubes, quickly melt in this time lapse video.

Water on black background, slow motion

Animation of the CNO cycle, a series of nuclear reactions that provides most of the energy in massive stars. The cycle converts four hydrogen nuclei (protons, red) into a helium nucleus, with a release of energy. It is a catalytic cycle, named as the nuclear reactions cycle through isotopes of carbon, nitrogen and oxygen. Initially, a free proton fuses with a carbon-12 nucleus, forming nitrogen-13 and emitting a gamma ray (yellow wave). This undergoes beta decay, in which a proton is converted to a neutron (yellow) with the emission of a positron (orange) and a neutrino (pink), forming carbon-13. Another proton then fuses, forming nitrogen-14 and a gamma ray, followed by a third proton, forming oxygen-15 and another gamma ray. This undergoes beta decay to nitrogen-15, emitting a positron and neutrino, before the fusion of a fourth proton ejects an alpha particle (helium-4), reforming the carbon-12. The process repeats in an endless cycle, converting hydrogen to helium and emitting energy. The CNO cycle is the dominant energy source for stars more than 1.3 times the Sun's mass. In Sun-sized stars, the proton-proton chain dominates: just 0.8% of the Sun's energy is produced by this cycle. For the proton-proton chain powering the Sun, see clip K003/3971.

Polarising filter, animation. A polarising filter (blue) allows light or other electromagnetic radiation whose electrical component lies at right angles (bottom) to the filter to pass through, but blocks those that are parallel (top) to the filter. As the top wave enters the filter it causes electrons to move (bright light in the column). These electrons absorb energy from the wave and absorb (filter) it. The electrons are constrained in the column and cannot move horizontally and so cannot absorb the energy from the bottom wave. Filters are used in sunglasses and photography to reduce glare.

Electric field lines are shown by using pepper in cooking oil. The two center electrodes are charged up to 30,000v with an electrostatic generator. The two central electrodes have the same charge and the field lines radiate out.

Time lapse video of a cube of water ice (H2O) melting on a table.

Three balloons bouncing

Water pouring into glass, slow motion

Water surface wave, slow motion

Animation showing Boyle's law in an ideal gas. The dials at right show the pressure (P), temperature (T) and volume (V) of the gas. Boyle's law states that, at a constant temperature, a decrease in the volume of a gas causes a proportional increase in pressure. When the arms compress the box, the particles of gas (grey) collide far more frequently with the sides of the container, which is seen as increased pressure. The law is named after Robert Boyle (1627-1691), who first published it in 1662. This animation is part of a series on the ideal gas laws. See K003 3525-3530 for the complete set.

Time lapse video showing an ice cube melting quickly.

High voltage discharge from a tesla coil.

Water flow on black background, slow motion

Slow Motion Water Pour

Water drips off leaf, slow motion

Video footage of a Tesla coil in action.

Four candles on a black background burning until they are extinguished

Super slow motion shot of water drop

Slow Motion Water Drop

Water pouring and splashing, slow motion

Maroon liquid dropping into a white and blue liquid

3d Man Presenting Light Bulbs

Fellow students doing an experiment

A car spark plug firing. The spark plug is the trigger that causes the gasoline to burn at a specific time in the car's internal combustion engine, providing the gas/air mixture the activation energy to start to burn. This is a critical component in the t

Two candles on a black background burning until they are extinguished

Balloons bouncing in slow motion

Water splash, slow motion

Coin sinking in water. Gloved hand placing a British one pound coin into a dish of water. A pound coin is made of copper, zinc and nickel, and is some 7.6 times denser than water. As it is more dense, it sinks to the bottom of the dish. For a repeat of the demonstration with mercury in the dish, see clip K003 3930. For the same demonstrations using a brass screw, see clips K003 3931 (mercury) and K003 3936 (water).

Petri dish containing ferrofluid on a powerful permanent magnet. A breeze is used to disturb the spiky shape the fluid takes in the field, but although individual spikes are disturbed, the overall pattern remains. Ferrofluid is a suspension of iron-rich nanoparticles in a carrier oil. In the presence of a magnetic field the iron particles become magnetised, attracting each other and following the shape of the magnetic field. This leads to the formation of spikes of liquid showing the magnetic field lines.

Confident manager holding a molecule in a meeting

Science student pouring blue liquid

Video footage of a Tesla coil in action.

A car spark plug firing. The spark plug is the trigger that causes the gasoline to burn at a specific time in the car's internal combustion engine, providing the gas/air mixture the activation energy to start to burn. This is a critical component in the t

Slow motion shot of water swirling

Water dripping in shallow puddle, slow motion

Water pouring and splashing, slow motion

Animation showing two gases at different pressures equalising their pressure when contact is made. The dials at the sides show the pressures (P) of each chamber. Initially, the chamber at left contains far more molecules of gas, which collide more frequently with the walls of the chamber, leading to a higher pressure. The chamber at right has fewer molecules and therefore fewer collisions. When the barrier is lifted, the molecules can travel into the adjacent chamber. More molecules from the high-pressure chamber move to the low-pressure side than vice versa, eventually leading to the pressure equalising. This animation is part of a series on the ideal gas laws. See K003 3525-3530 for the complete set.

Video footage of a Tesla coil in action.

Water flow on black background, slow motion

Animation of the CNO cycle, a series of nuclear reactions that provides most of the energy in massive stars. The cycle converts four hydrogen nuclei (protons, red) into a helium nucleus, with a release of energy. It is a catalytic cycle, named as the nuclear reactions cycle through isotopes of carbon, nitrogen and oxygen. Initially, a free proton fuses with a carbon-12 nucleus, forming nitrogen-13 and emitting a gamma ray (yellow wave). This undergoes beta decay, in which a proton is converted to a neutron (yellow) with the emission of a positron (orange) and a neutrino (pink), forming carbon-13. Another proton then fuses, forming nitrogen-14 and a gamma ray, followed by a third proton, forming oxygen-15 and another gamma ray. This undergoes beta decay to nitrogen-15, emitting a positron and neutrino, before the fusion of a fourth proton ejects an alpha particle (helium-4), reforming the carbon-12. The process repeats in an endless cycle, converting hydrogen to helium and emitting energy. The CNO cycle is the dominant energy source for stars more than 1.3 times the Sun's mass. In Sun-sized stars, the proton-proton chain dominates: just 0.8% of the Sun's energy is produced by this cycle. For the proton-proton chain powering the Sun, see clip K003/3971.

Water pouring splashing and bubbling

Video footage of a Tesla coil in action.

CGI animation of the solar system showing the planets revolving around the sun. Accurate relative sizes of the planets, and their periods of revolution around the sun.

Slow motion drop of water

Water drips reflecting rainbow colors, slow motion

Water balloon in super slow motion popping against a black background

Prism. Light being refracted through a prism.

Screw floating on elemental mercury (Hg). Gloved hand placing a brass screw into a dish of mercury metal. Mercury is a liquid at room temperature but it still has the density of a heavy metal, being some 13.5 times denser than water. Brass is an alloy of copper and zinc, and is around 8.5 times denser than water. As it is less dense than mercury, it floats on the liquid metal. For a repeat of the demonstration with water, see clip K003/3936. For the same demonstrations using a British pound coin, see clips K003/3930 (mercury) and K003/3935 (water).

Science student pouring liquid

The motion of a planets orbit around a star is simulated by rolling a ball on a curved surface of plastic.

Drip into pool of water, slow motion

Water drops, slow motion

Bubbling water, black background, slow motion

Animation showing the pressure-temperature law in an ideal gas. The dials at right show the pressure (P), temperature (T) and volume (V) of the gas. The law states that, at a constant volume, a decrease in the temperature of a gas causes a proportional decrease in its pressure. When the coolers are applied to the box, the particles of gas (grey) cool down (turning blue), and travel much more slowly. Their slower motion causes less frequent collisions with the sides of the container, which is seen as decreased pressure. The law is attributed to Jospeh Louis Gay-Lussac (1778-1850), but the basic principle had been established some 100 years beforehand by Guillame Amontons (1663-1705). This animation is part of a series on the ideal gas laws. See K003 3525-3530 for the complete set.

4ストローク機関

Animation of a four stroke engine's thermodynamic power cycle: intake, compression, combustion, and exhaust. At intake (blue arrow), a fuel air mixture is drawn in by the descending piston. At compression, the piston rises to compress the mixture. Combustion starts when the spark plug ignites the explosive compressed mixture and the piston descends again. Finally, the piston rises pushing the exhaust gases out of the cylinder (red arrow) ready for the cycle to begin again. This type of engine is found in most vehicles. Master file includes alpha channel in animation codec.

Geiger Counter Measuring Uranium in an Antique Plate. This is a fiesta ceramic plate that contains radioactive uranium. This is a radioactive ceramic plate called Fiesta ware, produced by the Homer Laughlin Company of West Virginia. The orange glaze prod

Water pouring and making bubbles slow motion

Water splash on black background, slow motion

Abstract water ripples, slow motion

Animation showing the behaviour of an ideal gas. The gas is composed of grey particles with a range of velocities. The dials at right show pressure (P), temperature (T) and volume (V). In an ideal gas, changes in any one of those three variables has a proportional effect on the others. The ideal gas law states that, all other things being equal, the temperature of a gas is proportional to the product of its volume and pressure. See animations K003 3526-3530 for demonstrations of these principles.

A birthday candle burns quickly in this time-lapse where 1 second is equal to 2 1/2 minutes.

Three glasses with primary colored (red, yellow, blue) ice cubes melt into secondary colors (orange, green, purple) in this time lapse video.

The strong electric fields created by the tesla coil cause the gas in a fluorescent light tube to glow.

Water splash on black background, slow motion

Slow motion shot of water pouring and splashing

Drip from leaf into pool of water

Water droplet, slow motion

Slow motion water drop

Bottle of water splashing, slow moiton

Water bubbles slow motion

Drop of water, magenta color, slow motion

Water moving in super slow motion under a green light

Pink balloon in super slow motion exploding against a black background

Close up of milk dropping

3d Man Presenting Light Bulbs

Classmates doing an experiment

Static electricity. View of light streamers inside a plasma globe. A plasma globe is a large glass vessel, inside which is a gas at low pressure. A voltage of static electricity is applied between the metal sphere at center and the glass. Static discharge

Time lapse video showing 4 glasses with different colored ice cubes melting.

Two balloons bouncing into each other

Water moving in super slow motion on the floor under a blue light

Hand pushing a Petri dish containing ferrofluid onto a powerful permanent magnet. Ferrofluid is a suspension of iron-rich nanoparticles in a carrier oil. In the presence of a magnetic field the iron particles become magnetised, attracting each other and following the shape of the magnetic field. This leads to the formation of spikes of liquid showing the magnetic field lines.

Cloud Chamber showing radioactive decay by creating a layer of cold super-saturated isopropyl alcohol. The high energy atomic particle cause the vapor to condense to a trail.

Electric field lines are shown by using pepper in cooking oil. The two center electrodes are charged up to 30,000v with an electrostatic generator. The two central electrodes have the same charge and the field lines radiate out.

Time lapse video of colored ice cubes melting in a glass.

Water balloon bouncing

Slow motion shot of water pouring

Water dripping, slow motion

Water drips on leaves, slow motion

Water surface, slow motion