Friday, April 23, 2010

I Propose We Make a Smoke Bomb

Links:
How to Make a Safer Smoke Bomb

Make a Smoke Bomb



The classic smoke bomb is very easy to make, but I know some of you are concerned about the possibility of accidentally setting off your smoke alarm or igniting the mixture during preparation. There is safer way to make a smoke bomb. It uses the same ingredients and produces a comparable amount of smoke, but it takes a bit longer to make. Here's how to make the safer smoke bomb:

Smoke Bomb Ingredients
•potassium nitrate or saltpeter (if you can't find it at a garden store I see Skylighter sells it online)
•sugar (sucrose)
•water
fuse
•paper or plastic cups
•plastic spoon
•waxed paper

Construct the Smoke Bombs
1.In a paper or plastic cup, mix 3 parts potassium nitrate with 2 parts sugar (e.g., 3 tablespoons potassium nitrate and 2 tablespoons sugar).

2.Using your plastic spoon, stir in just enough water to make a thick paste. Continue stirring until the ingredients are evenly mixed.

3.Set lumps of the mixture (~1 tablespoon each or a little less) onto the waxed paper. Insert a fuse into each lump.

4.Allow the smoke bombs to set up for 1-2 days. The drying time will depend on temperature and humidity. Warmer and drier is faster; cooler and damper will take longer. Keep the smoke bombs away from excessive heat or flame. The smoke bombs will be like clay when they are ready, not hard and solid.

5.Set a completed smoke bomb outdoors on a fireproof surface and light it.

Saftey:
-Wear goggles
-No loose clothing that could get caught
-Wear gloves



Thursday, April 1, 2010

OMG WE HAVE A TEST TOMORROW


I'm not ready for this test because Matt Ho is distracting me. I have too much homework and studying to do tonight. AIYAH whatever shall I do? I guess I need to learn how to balance my time and work while dealing with friends and family. This is going to be a tough adjustment but it's a necessary one.

DOMO


So I had a dream about Domo and it made me want things to go back to the way they were. It was really weird because he seemed to have the same dream and texted me about it. All the memories came back and now Matt Ho is sitting next to me and we're talking about our love lives, I mean mine.

Charles's Law


In modern physics, Charles' Law is seen as a special case of the ideal gas equation, in which the pressure and number of molecules are held constant. The ideal gas equation is usually derived from the kinetic theory of gases, which presumes that molecules occupy negligible volume, do not attract each other and undergo elastic collisions (no loss of kinetic energy); an imaginary gas with exactly these properties is termed an ideal gas. The behavior of a real gas is close to that of an ideal gas under most circumstances, which makes the ideal gas law useful.

This law of volumes implies theoretically that as a temperature reaches absolute zero the gas will shrink down to zero volume. This is not physically correct, since in fact all gases turn into liquids at a low enough temperature, and Charles' law is not applicable at low temperatures for this reason.

The fact that the gas will occupy a non-zero volume - even as the temperature approaches absolute zero - arises fundamentally from the uncertainty principle of quantum theory. However, as the temperature is reduced, gases turn into liquids long before the limits of the uncertainty principle come into play due to the attractive forces between molecules which are neglected by Charles' Law.

Boyle's Law


This relationship between pressure and volume was first noted by two amateur scientists, Richard Towneley and Henry Power. Boyle confirmed their discovery through experiments and published the results. According to Robert Gunther and other authorities, it was Boyle's assistant Robert Hooke, who built the experimental apparatus. Boyle's law is based on experiments with air, which he considered to be a fluid of particles at rest, with in between small invisible springs. At that time air was still seen as one of the four elements, but Boyle didn't agree. Probably Boyle's interest was to understand air as an essential element of life [4]; he published e.g. the growth of plants without air [5]. The French physicist Edme Mariotte (1620-1684) discovered the same law independently of Boyle in 1676, but Boyle had already published it in 1662, so this law may, improperly, be referred to as Mariotte's or the Boyle-Mariotte law. Later (1687) in the PhilosophiƦ Naturalis Principia Mathematica Newton showed mathematically that if an elastic fluid consisting of particles at rest, between which are repulsive forces inversely proportional to their distance , the density would be proportional to the pressure [6], but this mathematical treatise is not the physical explanation for the observed relationship. Instead of a static theory a kinetic theory is needed, which was provided two centuries later by Maxwell and Boltzmann.

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