Friday, 28 January 2011
Tuesday, 18 January 2011
Well, this is what happens when you cool a liquid down to absolute zero. (Well almost absolute zero, currently it is near impossible for humans to do so.)
So what happens to a liquid at around absolute zero that gives it the ability to move out of it's container?
Absolute zero is bloody cold: -273.15°C. At this degree of temperature, certain elements, such as helium(II) experience a total loss of viscosity, allowing the substance to overcome all friction forces. This is called the Lambda Point, and allows a superfluid to move against all forces (such as gravity,) allowing a superfluid to move upwards and around obstacles, effectively giving it an appearance of traveling strait through an object.
Saturday, 15 January 2011
His second law covers this too, with the simple equation F= ma (Resultant force = mass x acceleration)
If my F= 0, it is clear to see that I will not accelerate.
What I think is more important about this second law is that it links acceleration to mass, and thus gives mass (a very hard concept to explain) a definition (though there are several); the measure of an objects resistance to acceleration.
Tuesday, 4 January 2011
Saturday, 1 January 2011
I assume you’ve all heard of 3d printing, well those kids down at Cornell University’s Computational Synthesis Lab are taking things one step further and claim to be making a printer that prints food!
All you have to do is pop in the raw food inks,download your recipe and wholla!
It also will apparently have the added bonus of reducing the amount of waste, be that food and/or packaging. According to their blueprint their current design includes precise syringes that will layer up food inks line by line, layer by layer.
Currently they can only use food that are melted or liquefied versions of food.
Does this mean we'll be able to chose exactly the shape, size and whereabouts of chocolate chips in a cookie? :)
Soon enough we'll seldom need to go outside! ... Or be too fat to.
The thought of humans eating like this sickens me. What's wrong with a fresh banana?