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Cloud Chamber
In this image you can see a 'thoriated-tungsten welding rod' emitting alpha radiation inside a 'r'. A cloud chamber is a simple particle detector which creates a cold atmosphere of super-saturated alcohol vapour. As a particle is emitted from the rod, it collides with the vapour, causing it to condence back into water droplets, forming these tiny white trails. To find out how to make a cloud chamber, check out the source video: http://youtu.be/orMOkagId04
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Comets: The Dirty Snowballs of Space
Comets are huge rocky bodies in space, that can be several miles in diameter. The objects are covered in frozen carbon dioxide, water, carbon compounds, and even complex organic molecules like amino acids. Some comets orbit our solar system over the course of hundreds of years, others only survive a single trip before plunging into the Sun. To find out more about comets & how to make a miniature one like this, using with some dry ice and Worcester sauce, check out the source video: http://youtu.be/QiB036KJ7vw
Which lands first… the chicken or the egg?
If a chicken & egg are simultaneously dropped from the same height - which will hit the ground first? Well, actually, it’s a draw in this gravitational race. If two objects with different masses are simultaneously dropped from the same height, they will both hit the ground at the same time.
This is because of the difference in inertia - objects with a greater mass require more energy to get them going. The ratio between mass and interia is the same for everything & balances out - therefore everything experiences the same acceleration due to gravity.
Find out more in this source video: http://youtu.be/bHsQ3V2AmEE
Cakes rising
What happens if you leave out a vital ingredient from your cake? In this image you can see a time-lapse of four cakes, but only one of them has all of the necessary ingredients. No margarine means that there is no fat to coat the protein within the egg, meaning more gluten & a thicker cake. No egg means that there is not protein structure to contain expanding gases. No baking powder means there is no excess carbon dioxide to help your cake to rise. Find out more about the science of baking cakes & see what these different batches look like on the inside in this source video: http://youtu.be/MBouLt-hXDU
Ross Exton and the atbristol team are back in the kitchen again: this time with cake!
Invisible test tube
Placing a test tube into a beaker of glycerol can make it turn invisible! How? A trick of the light. You can still see a transparent test tube placed in water as light passing through the different materials is bent & refracted. But if you switch the water for something with the same refractive properties as the glass of the test tube, the light passes straight through without refracting, thus appearing invisible. Learn how to perform this scientific magic trick at home in this video: http://youtu.be/UIovk_LgHRA
(via @RossExton)
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Atomic and Solar System Model
At least two entangled (physically intersected) fields that vary periodically with opposite (Figure A) of equal (Figure B) phases create in their mutual intersection four new fields that represent the subatomic particles of the central nucleus. It is an alternative atomic and solar system model.
Dough rising
When making a loaf of bread, yeast is mixed into the dough to help it rise. These living micro-organisms begin anaerobic respiration - converting glucose into ethanol and carbon dioxide. The carbon dioxide gas is trapped by the gluten matrix of the dough, causing it to rise and take shape. After two hours of 'proving', the dough is ready to put into the oven and set the structure in place as it bakes. Find out more about the science of how to make bread in the source video: http://youtu.be/tSNvmr41RSQ
Miniature Lightning
A Van de Graff generator works by creating a large static positive charge on a metal dome. When a metal 'wand' connected to the earth is brought into close proximity to the dome, negatively charged electrons jump the gap, creating a blue spark. For more on how you can use static charge & how to use a Van de Graff generator to make a 'lightsaber' check out the source video: http://youtu.be/0OczYKJPNps
