Listening for sounds with a stethoscope at the bottom of the lungs would be described as the apex

The initial blast wave associated with an incendiary explosion is likely to cause:

A) lacerations and abrasions. B) compression injury to ears, lungs, and hollow air-filled organs. C) sudden death. D) burns.

What is an indication that a hose stream has cooled ceiling-level gases?

a. the smoke level drops to the floor b. the atmosphere in the room clears c. water droplets rain down d. the ceiling becomes plainly visible