the assignment is to build a bushfire safe house plan:what is a fire resistant material i can use to build the walls and floors from?
Go with a glock in 9mm, 40 SW, or .45ACP. The only objects in the average home that will stop these bullets are a toilet and an old steel bath tub. They will zip right through sheet rock and furniture. Refrigs, washers, and dryers will slow down but not stop bullets these bullets. A glock in these calibers offer moderate recoil for faster follow up shots. Important when against multiple people. As for effectiveness, you are not sacrificing effectiveness by going with the .40 or .45. Opinions may differ on the 9mm, but I think its a great bullet. With the .50AE or .44 Mag desert eagle all you get is more recoil, less bullets per mag, and more noise. The .357 mag desert eagle is in the same power class as the glock calibers. The glock is about half the price of the desert eagle. The desert eagle is best for impressing people on the range. On a side note. A glock goes for about the same price as on AK-47 and the desert eagle goes for around the price of an M-16/AR-15. Both are better for the situation you describe. Sorry but I won't touch a, which is better AK-47 / M-16 debate.
I would suggest NOT to. Foam is pretty combustible. In fact, several years ago, I remember hearing that if you have an egg crate (foam mattress cover) NOT to smoke etc. due to fire hazard around it, or on it. Take care.
Using the fire extinguisher would certainly move you, but not necessarily in the direction intended. In order for the fire extinguisher trick to work, the extinguisher would have needed to sit right at your “center of mass.” Imagine that kind of like the center of a seesaw with equal weights on both seats — it’s the point where, if a pivot were placed there, the object would stay balanced and in place. Spraying a fire extinguisher from this point would push you balanced and upright in whatever direction you wanted to go. But spraying from any other point would throw you off balance and spin you around — kind of like pushing someone on an ice rink in the shoulder. This spinning would be faster and more disorienting than on Earth because there’s no resistance in space.
