challenge articles
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 temperature must the D-T plasma reach to overcome electrostatic repulsion?
What is the primary magnetic confinement device mentioned for containing superheated plasma?
What percentage of energy output in a D-T fusion reaction is carried away by energetic neutrons?
What must the Tritium Breeding Ratio (TBR) be greater than for a plant to achieve self-sufficiency?
What common element is placed inside the breeding blanket to generate new tritium fuel?
What is the immediate threat posed to a reactor's integrity by flaws in magnetic confinement?
What key engineering reliability metric is necessary for economic viability alongside high performance (Q factor)?
What two primary issues arise from the bombardment of the reactor's inner structure by high-energy neutrons?
What major hurdle must be overcome regarding tritium supply for long-term fusion power?
What fundamental change in objective marks the shift from scientific proof to commercial engineering for fusion?