propagation articles
What are gravitational waves fundamentally described as?
At what speed do gravitational waves travel in a vacuum?
What condition is necessary for the generation of detectable gravitational waves?
Which catastrophic event represents the most energetic source known for producing gravitational waves?
How does the propagation of gravitational waves contrast with sound waves?
What is the observational phenomenon when a neutron star merger is seen via both light and gravitational waves?
What geometrical effect do gravitational waves cause on a circle of freely floating test particles as they pass?
What distinguishes the propagation of a gravitational wave from that of light (an electromagnetic wave)?
Why must gravitational radiation be at least quadrupole radiation, unlike electromagnetic waves?
How does the amplitude of a gravitational wave change as it propagates over vast interstellar distances?
What are the two possible polarizations that describe how a gravitational wave can stretch and squeeze spacetime?
What results from using dull or dirty shears to take a cutting?
What is a crucial immediate step after sterilizing cutting implements with a bleach solution?
Why must a propagation cutting contain nodes?
What specific risk do softwood cuttings face despite rooting easily?
What critical issue arises when the rooting medium is too dense or poorly draining?
What is often cited as the single greatest cause of early cutting failure?
For most cuttings, where is targeted warmth necessary to encourage root production?
What dangerous pathogen incubator is created by high trapped moisture at the stem base combined with cool temperatures?
What mistake related to rooting powder application can contaminate the supply?
If a cutting remains green but fails to produce roots after several weeks, what primary factor might be responsible?
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?