What are high explosives?
What are high explosives?
High explosives (HE) are explosive materials that detonate, meaning that the explosive shock front passes through the material at a supersonic speed. High explosives detonate with explosive velocity of about 3–9 kilometres per second (9,800–29,500 ft/s).
What is the difference between low explosives and high explosives quizlet?
What is the difference between low explosives and high explosives? Low explosives are explosives with a velocity of detonation less than 1,000 meters per second. High explosives are an explosive with a velocity of detonation greater than 1,000 meters per second.
Are high explosives safer than low explosives?
A high explosive bursts and explodes very fast. High explosives produce more pressure than low explosives but low explosives are more safe to use. People use low explosives in fuses, rocket engines and fireworks, and high explosives in mining and demolition (destroying old bridges and buildings).
What makes a high explosive high?
High explosives, such as the RDX in the drawing, have the fuel and the oxygen built into the same molecule. The molecule is like a wound-up spring waiting for a stimulus to release its energy. That stimulus is a shock wave that travels through the material much faster than the flame of low explosive deflagration.
What are 2 types of high explosives?
High explosives will be referred to Type E explosives, and there will be three sub-types in this group:
- 1 – blasting and bulk explosives (explosives used for commercial blasting applications or for their manufacture);
- 2 – perforating explosives (intended for use in the oil and gas well industry);
What is the most powerful explosive in the world?
PETN is a powerful explosive material with a relative effectiveness factor of 1.66. When mixed with a plasticizer, PETN forms a plastic explosive….Pentaerythritol tetranitrate.
| Names | |
|---|---|
| Density | 1.77 g/cm3 at 20 °C |
| Melting point | 141.3 °C (286.3 °F; 414.4 K) |
| Boiling point | 180 °C (356 °F; 453 K) (decomposes above 150 °C (302 °F)) |
| Explosive data | |
What is the most explosive liquid on Earth?
Like all azides, it reacts with water to emit explosive, highly toxic hydrogen azide. Azidoazide azide has been called “the most dangerous explosive material in the world.” It is also No….Azidoazide azide fast facts.
| CAS Reg. No. | 1306278-47-6 |
|---|---|
| Melting point | 78 ºC |
| Water solubility | Dec. to HN3 |
Which is stronger TNT or C4?
C4 is 18% more powerful than TNT. Ammonium nitrate in its pure form is a fairly weak explosive. When combined with fuel oil, however, it gains an explosive power nearly equal to TNT.
What does PETN stand for?
pentaerythritol tetranitrate
What is C4 made of?
C-4 is composed of explosives, plastic binder, plasticizer to make it malleable, and usually a marker or odorizing taggant chemical. C-4 has a texture similar to modelling clay and can be molded into any desired shape. C-4 is metastable and can be exploded only by the shock wave from a detonator or blasting cap.
Why is the plastic explosive Semtex called hot?
Name controversy The drink is named after Semtex – a popular plastic explosive also invented and produced in the Czech Republic by Explosia a.s., a subsidiary of Synthesia. According to Pinelli’s director Květoslav Srovnal, the name inspired “a feeling of activity and motion”.
What does PETN look like?
An explosive substance called PETN was found in each of the devices, a source close the investigation has told CNN. What does PETN look like? Pentaerythritol tetranitrate, to give it its full name, is a fine white powder that resembles sugar or salt.
How much does a pound of dynamite cost?
Prices
| Product | Price |
|---|---|
| Plastic Explosive (C4) | $17/lb |
| Dynamite | $10/lb |
| Semtex Grenades | $50/lb |
Is RDX a high explosive?
RDX is often used in mixtures with other explosives and plasticizers or phlegmatizers (desensitizers); it is the explosive agent in C-4 plastic explosive. It is stable in storage and is considered one of the most energetic and brisant of the military high explosives, with a relative effectiveness factor of 1.60.
What is the speed of an explosion?
The detonation speeds are much higher in high explosives than in gases; they range from 5000 to 8000 m/s. Peak pressures are also much higher; ranging from 100 to 400 kbar (1 kbar = 100 MPa).
How many PSI can kill you?
Possible effects on living beings As the fatal wounding threshold value is around 40 psi and the peak pressure for DM-41 hand grenade is 268 kPa (~38,87 psi), it is definite that the value is between the limits of fatal wounding.
How fast do you have to be to outrun an explosion?
Gas explosions can either deflagrate or detonate based on confinement; detonation velocities are generally around 1600 m/s to 1800 m/s but can be as high as 3000 m/s. Solid explosives often have detonation velocities ranging beyond 4000 m/s to 10300 m/s.
How does an explosion kill you?
A nuclear explosion releases vast amounts of energy in the form of blast, heat and radiation. An enormous shockwave reaches speeds of many hundreds of kilometres an hour. The blast kills people close to ground zero, and causes lung injuries, ear damage and internal bleeding further away.
What happens to your body in a explosion?
The main direct, primary effect to humans from an explosion is the sudden increase in pressure that occurs as a blast wave passes. It can cause injury to pressure- sensitive human organs, such as ears and lungs.
What was the biggest explosion ever?
Tsar Bomba
Can gasoline explode without a spark?
You could heat the gasoline up to a high enough temperature that it could ignite spontaneously: without even a spark.
What makes a gas tank explode?
An LPG explosion is almost always caused by the accumulation of gas leak in an enclosed space combined with an ignition source, not a Propane-LPG tank explosion (gas cylinder explosion). The leak can be from the gas appliance or other source not involving the bottle.
Can gas spontaneously combust?
As for gasoline-soaked rags, they usually require an ignition source to ignite their vapors. However, spontaneous combustion can occur if gasoline-soaked rags reach their auto-ignition point of 495°F-536°F.
Can a gas cylinder explode?
Propane is explosive and propane can explode but a propane-LPG tank explosion is actually very rare. Propane tanks (gas cylinders) can explode but not easily or often.
Are gas cylinders safe?
Gas cylinders should be stored away from sources of ignition and other flammable materials. Ensure the valve is kept shut on empty cylinders to prevent contaminants getting in. Store gas cylinders securely when they are not in use. They should be properly restrained, unless designed to be free-standing.
Are empty gas cylinders dangerous?
What is the hazard? Cylinders containing compressed, liquefied or dissolved gases can create a dangerous situation in the event of a fire. This is because they may explode as a result of the heat generated. In principle, empty cylinders should be treated in the same way as full cylinders.
How can you prevent gas explosions in your home?
What Everybody Should Know About Preventing Gas Explosions
- Install natural gas detectors both in your home and in the workplace.
- Install gas detectors anywhere gas could possibly accumulate, but also where people will be able to hear the alarm.
- Maintain and monitor gas detection equipment on a regular basis.
What is the most explosive gas?
TNT. One of the most commonly known explosive chemicals is trinitrotoluene, or TNT, which has featured extensively in video games and films.
How many houses explode from gas leaks?
An estimated average of 4,200 home structure fires per year started with the ignition of natural gas. These fires caused an average of 40 deaths per year.
What are the signs of a gas leak in your home?
Gas leak signs in the home
- the smell of sulfur or rotten eggs.
- a hissing or whistling sound near a gas line.
- a white cloud or dust cloud near a gas line.
- bubbles in water.
- a damaged gas pipe.
- dead houseplants.