Why should you always keep materials at least 6 inches inside of a fume hood A. To reduce clutter under the hood
B. To prevent vapors from escaping the hood
C. To improve visibility under the hood
D. To prevent accidental spillage

Also, placing chemicals at least six inches inside of the hood will limit the potential for fumes to escape into the laboratory. Keep the sash at 18 inches or less from the working surface while using the hood to ensure maximum flow rate and to protect yourself from potential chemical splashes or explosions.

Explanation:

answer: cesare beccaria developed the classical school of criminology with from philosopher jeremy bentham

explanation:

snell's law

refractve index = sin incidence / sin refraction