For the test tube with the ratio of Acetylene to air is 1:3, a flame traveled down a test tube even slower, there was a slight popping noise and black residue . For the test tube with the ratio of Acetylene to air is 1:7, a flame traveled quickly down a test tube, popping noise and less black residue. Refer to table 1 for the specific lab results.
Depending on the source, and the perspective of the author, there are two main theories or justifications for the fire. One is that the fire was caused and intentionally fueled by arsonists inside the compound. The other theory is that the fire was caused as a result of the FBI throwing tear gas into the partially destroyed building where residents were firing and receiving active gunfire. The areas where tear gas, a flammable component, was introduced were very heat sensitive because of the constant gun fire that was occurring. The cause of the fire is important because if the residents started and fueled the fire then they were responsible for the fire, but if the fire was caused by the FBI then the eighty deaths are in the hands of the
The crime scene investigators took a sample of unburned carpet in order to determine the chemical composition of the carpeting in order to determine what, if any, accelerants were used to start the arson fire. By examining the unburned section of carpet, it gives them a baseline on which to start their testing.
5.The evidence from the scenes should be collected by putting them into air-tight containers to help them from the evaporation of flammable substances. The paint cans would be good because of their airtight lids, and you would avoid the uses of plastic bags because they will produce harmful gases when it's mixed with these substances.
The pyrotechnics that ignited the fire were designed to spray sparks 15 feet for 15 seconds. The two that were mounted at outward angles ignited foam that had
In recent years, the oil and natural gas industry has continued to expand to populated areas, thus growing a concern for nearby communities regarding volatile organic compounds (VOCs) air toxics and human exposure.1 Current screening methods to determine exposure of toxic VOCs such as the family of Benzene, Toluene, Ethylene and Xylene (BTEX) requires a traditional gas chromatograph (GC), which requires high energy use and its bulky size is not ideal for long-term field deployment and real-time measurements. Sensor technology advancements have enabled the use of low-cost devices to measure VOCs, but require additional techniques for chemical speciation for BTEX identification (i.e.
The roof was asphalt shingle over wood shingle and the visible roof joints were lumber. Exterior walls were wood siding. The foundation was stone. About one ton of combustible furniture were placed inside the building and then using a plastic explosive the structure was blasted. The fire started and developed very fast. Large portion of the roof collapsed before igniting on the exterior. The firebrands found at the downwind area, were probably incapable of initiating a new fire.
Fire burn patterns can provide information to the investigators. Specific types of patterns can tell investigators what the type of accelerant was used. The burns can also show where and what caused the fire. Depending on the burn patterns it can show the temperature of the fire. There are also a number or burn patterns that can be examined depending on the type or fire and the location of
After watching the demonstration, Ethylene Dichloride, Isopropyl alcohol, and hexane could be the mystery chemical, because they are all flammable. However, looking at the physical and chemical properties, the isopropyl alcohol could be eliminated because it is soluble in water. Therefore, the more it is dissolved, the less it is going to be flammable. Ethylene Dichloride is partially soluble in water, and it is oily. So partially soluble chemicals mostly mix with the other chemicals, so the flammable capabilities of Ethylene Dichloride are gone. Therefore it is not the mystery chemical. Hexanes is the mystery chemical, because it’s specific gravity is of .66 which is much less dense than water, meaning it will stay on top, and it is not soluble.
The severity of a chemical burn depends on the following factors: corrosive capability of the chemical burn, concentration of the chemical, temperature of the chemical or the solution in which it dissolved and lastly, duration of the contact with the chemical (page 294). Also an important dependent on the severity of the burn is by how deep the burn in question penetrates through the skin. This is determined by the location of the burn, age of the victim, and the amount of burned area (page 293).
When most people think of gas cans containing flammable liquid they associate the gas can as potentially flammable. This can be compared to the dangers of operating an ATV over rough ter-rain. Both products have a certain level of risk and provide guidance of use on warning levels, however manufacturers can still be blamed for damages the product has
• Occupancy of the building – often affects fire behavior…each occupancy has different hazards & fuels, and the structural components are subjected to different temperatures, heat release, & duration.
Explosives detection is critically important in many field settings (e.g., military facilities, minefields, crime scenes, and remediation sites) and has become a necessity for the safety of the general public (e.g., at airports and mass transit areas), there remains a demand for inexpensive and reliable explosive instruments for identifying specific explosives. High explosives are considered to be organic and oxidizing, a relatively uncommon mixture that makes them tractable for molecular recognition.
Gas audibly leaked out at high pressure, ignited and exploded and produces a catastrophic fire which blown through the fire walls. The fire from the explosion had destroyed some of the oil lines and soon larger quantities of stored oil were burning out of control. An automatic system, which has been designed to spray water on such fire, had been turned off. Moreover, the accommodations were design in such a way that not smoke-proofed.
For starters, why would someone want to burn property Many people assume that the people that are setting these fire are bad kids or teenagers acting out or looking for attention, but that not the case. The real reason is so people can lie to insurance company and gain money. Sometimes business owners hire professional arsonists to burn down there business without leaving a trace of arson. Other than that investigator might be dealing with a pyromaniac. A pyromaniac is a person who absolutely loves fire. The smell of gas or smoke sends them into ecstasy. Lighting a candle and blowing it out and relighting it and blowing it out repeatedly, watching the smoke lightly twirl around in the air, is a good sign of a pyro. Many pyros can figure out different types of gas and/or what's being burnt just from the