medium articles
What is the primary advantage of a bare-bottom tank regarding maintenance?
What issue arises from the particle size of gravel if uneaten food settles deep within and is not addressed?
What specific problem can result from sand compacting tightly in an aquarium substrate?
What crucial property allows specialized aquarium soil to hold onto vital nutrients for plant roots?
How do nutrient-rich aquarium soils typically affect water chemistry when first established?
What is the primary role of microfauna like springtails and isopods in a bioactive substrate setup?
What key characteristic must substrates for Tropical/Rainforest Species prioritize regarding moisture management?
What quality must substrates formulated for Arid/Desert Species like Leopard Geckos prioritize regarding water content?
If using raw topsoil in a DIY terrestrial substrate mix, what crucial subsequent step is required?
Across all applications, what physical properties must substrates allow for optimal root environment?
What fundamental requirement defines sound as a mechanical wave?
What is the term for the region of higher pressure created when a vibrating source pushes surrounding particles closer together?
How do the particles of the medium move as a sound wave travels through them?
What is the approximate speed of sound in air at standard sea-level conditions ($20^ ext{o} ext{C}$)?
Why is sound transmission in water much more efficient than in air?
In which state of matter, exemplified by steel, does sound generally travel the fastest, approaching $5000 ext{ m/s}$?
What type of wave can solids support that liquids and gases primarily cannot, involving particle oscillation perpendicular to wave travel?
What two primary intrinsic physical properties govern the speed at which sound travels through a medium?
How does density generally affect sound speed when comparing materials of similar elasticity?
What mathematical relationship defines Acoustic Impedance?
What phenomenon occurs when sound moves across a boundary between media with significantly different acoustic impedances?