How to Build a Rocket
Rockets – They are one of the most enjoyable pyrotechnic devices. Small lightweight rockets can be made using Black powder, which is used popularly as rocket propellant and is easy to mix. We have explained the basic steps that can follow to make a simple rocket.
First make the black powder mix. Use Potassium Nitrate, Air Float Charcoal,80 Mesh Charcoal, Sulfur in the ratio of 16:6:3:4. This is a optimum mix ratio, grind all the mix into a container and make a fine free flowing powder. Pass it though a mesh preferably 20 Mesh steel mesh.
Take a 4 Oz Engine tube for making the Body of the rocket. Now ram the fine grained black powder mix into the tube up to 80% and a little air room. You can use a ‘ram through funnel’, which will make our task easy, the rammed materials inside the body of the rocket should be hard.
Now fill in clay after making it a little moist and fill it in the space where the room for air has been left. Now punch a thin hole in the clay using a thin object, say needle. This is for the fuse. A ready made fuse can be obtained from a firecracker or by coating a cotton string with the same black powder material.
Attach the fuse to the under part of the rocket body through the clay, also make a conical head of paper materials.
Now tape a long stick to the rocket for stability. The rocket is ready now, bury the stick in the sand upright and light the fuse, watch it skyrocket upwards.
Categories: Education, Learning, Science Tags: Air Float Charcoal, Black, build rocket, How to Build a Rocket, Mesh Charcoal, Oz Engine, Rockets They, tape, Use Potassium Nitrate
How Your Brain Works
Your Brain – General Features
The Human Cortex
The most striking feature of the human brain is seen in the cortex. This is the folded, hemispherical structure which constitutes the bulk of the visible brain.
It is not present in reptiles.
The cortex is relatively recent. It is perhaps one hundred thousand years old and is the part of the brain most closely associated with our ability to form complex representations of the external world, to reason logically and to use language.
It is much more dominant in humans than in any other species.
Regions of the cortex control vision, our auditory senses, and voluntary movement and touch sensations. It is also crucial for long term memory.
Neurons and Networks
The central nervous system is composed of something like one hundred billion nerve cells or neurons.
Each nerve cell or neuron possesses a single axon along which it can pass electrical signals to other neurons. Incoming signals are carried by a neuron’s dendrites which form a tree-like structure around the neuron.
Neurons are about one micron (1 millionth meter) in diameter. The dendrites are perhaps ten times this in length while the axon varies from a millimetre up to one metre in length.
The signal from one neuron reaches another at the junction of axon and dendrite — the synaptic gap.
The typical voltages associated to these signals are small (tens of millivolts) and travel at about two hundred miles an hour (100 metres per second)
Typically neurons can only fire once every millisecond (one thousandth of a second)
Different patterns of electrical firing activity are associated with different brain functions.
Learning and Connections
The brain is both robust (able to function in the event of severed connections and/or dead neurons) and plastic – able to adapt to new memories and functions.
This is due to ability of the brain to form new connections between neurons. These connections take place at synapses and are
mediated by the release of neurotransmitter chemicals.
These neurotransmitters alter the effective strength of the signal which can pass between
neurons.
During our early years and during any kind of learning process these connections form and change their strengths.
The power of the brain as a computational device derives from the complex network of neural pathways and the simultaneous processing capability of all the neurons.
One such immensely powerful device belongs to you.
You can personally programme this device (your brain) to deliver everything you have ever truly desired.
This Genie within you is simply waiting to be told what it is you want.
So set your Genie some exciting tasks to perform and pilot yourself to a future of positive expectation.
Categories: Education, Learning, Science Tags: about, activity, brain, chemicals, genie, How Your Brain Works, Human, human cortex, language, Learning, neurons, power, power of the brain, The Human Cortex, This Genie, Works, Your Brain General Features
Killing Action In Box Head 2
Looking for more excitement in playing game virtually? Don’t you feel bored in just an ordinary game, like Football league or fighting troop’s game? Find other new experience in the virtual game that available online. Many sites are offering more fantastical action game that you have never imagine before. It is time for zombie killing.
In websites there are many maybe hundreds of information that explain about the Box Head 2. The game developed by Sean Cooper is known as ‘Zombie killing action’. This game are played vie online; can be played with single or by two people. Box Head 2 is a game where the players are boosted with their adrenaline, because this is the matter of killing or to be killed. In this game you are proved of how the smart you are to keep in going in the mass of zombie.
To play Box Head 2 is just by selecting whether you are playing single or you play with partner then choose the button of Cooperative or Deathmatch. Then it is the time you choose the type of the game, choose the character you want to be and select a room that is in favor with you. Here is tips for you, use shotgun to kill zombies and use the Uzi to destroy the devils. So enjoy your game.
Categories: Entertainment, Popular Tags: about, Box Head, box head 2 the rooms, Find, Killing Action In Box Head 2, Looking, Sean Cooper, Web
