You're correct! OSHA's explosive symbols are used to label materials that release great amounts of energy in all of the following forms *except* electrical energy.

Here's why:

* Mechanical Energy: Explosives can generate immense mechanical force, causing projectiles, blasts, and structural damage.

* Heat Energy: Explosions produce significant heat, potentially causing fires and burns.

* Light Energy: Some explosions create blinding flashes of light.

* Sound Energy: The rapid expansion of gases in an explosion creates a powerful shockwave that travels as sound.

Electrical Energy: While some explosives can be *initiated* by an electrical spark, they don't inherently release electrical energy as part of their explosive reaction.

Let me know if you have any other OSHA-related questions!