Afarm worker was moving a bale of hay with a forklift. the edge of the machine hit a tall stack of feed, making the top feed sack fall and hit a co-worker in the head. the co-worker suffered blunt force trauma to his head. what type of hazard is represented in this scenario? a. struck-by hazard b. caught-in or caught-between hazard

Dr. arenas is a scientist who has been trying to determine if increasing pressure will increase the sound that occurs when two chemicals explode. it measures the volume of the sound that occurs at the minimum pressure at which the explosion will occur. it then increases the pressure and measures the volume of the explosions that occur. what kind of investigation is the scientist conducting?