ocr: What makes a good explosive? In the right conditions, many ditterent substances react and release heat. Some of them even explode. But that doesn't mean they all make good explosives. A car engine is turned over by hundreds of tiny explosions of ordinary gasoline each second. But the gasoline that you put in a car will explode only in special conditions. Out in the open, gasoline burns much more slowly, so it does not make a good explosive. Some materials explode so readily that they are too dangerous to use. Metals like sodium, potassium, and cesium, for example, react when they come into con ...
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