130s Classroom → 35s Sub-90 Target27-Q Physics Mock
Archetype Sub-90 Dry-Wipe Invariant (Wave Equation (v = fλ), Refraction Invariance, Pulse-Echo Sonar (d = ½vt), Relative Waves & Redshift): Refraction invariant: frequency f NEVER changes across a boundary (v1/λ1 = v2/λ2). For echo/ultrasound, halve time (t/2) immediately; for a particle on a transverse wave, distance per cycle = 4 * Amplitude.
sub90 ESATARCH-P-11: Wave Equation (v = fλ), Refraction Invariance, Pulse-Echo Sonar (d = ½vt), Relative Waves & RedshiftPhysics
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SUB-90 ZONE (<30S)
0.0s30s Sub-9090s ESAT Budget150s Classroom
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