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How would the bomb explode underground, in the absence of any oxygen?
Bomber kräver inte att syre ska explodera , de behöver bara ett explosivt material och någon form av detonator. Brand kräver att syrgas fortsätter att brinna men explosiva material gör det inte.
An explosive material, also called an explosive, is a reactive substance that contains a great amount of potential energy that can produce an explosion if released suddenly, usually accompanied by the production of light, heat, sound, and pressure.
Explosive materials may be categorized by the speed at which they expand. Materials that detonate (the front of the chemical reaction moves faster through the material than the speed of sound) are said to be "high explosives" and materials that deflagrate are said to be "low explosives". Explosives may also be categorized by their sensitivity. Sensitive materials that can be initiated by a relatively small amount of heat or pressure are primary explosives and materials that are relatively insensitive are secondary or tertiary explosives.
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How can a bomb that can sometimes be scratched/damaged from pressure, in a creature's belly, underground, be signalled with an overground detonator?
Det finns en viss mängd "plottmagi" här, men bomberna är inte riktigt under något underjordiskt tryck, eftersom de har svalits hela.
När det gäller radiosignalerna är det sant att dessa inte propogar väldigt långt under jorden, vanligtvis bara några meter , men i det här fallet är det precis så djupt graboiderna är. Du kan berätta eftersom explosionerna gör det till ytan med relativt små mängder sprängämnen per enhet