I have done some research online about this, but have not found a clear-cut answer. I am wondering what the difference is between different types of explosives? Like how nitroglycerin can explode simply through impact, while other explosives require a spark, and others electricity. I am assuming it is all about what is required to cause the activation for the explosion, but I am just trying to get a better grip of what we only briefly skimmed over in chemistry. Thanks.