waves 0.0 / 5 ? ScienceWavesGCSENone Created by: Bear McFluffyCreated on: 11-04-18 06:55 356214 Across 1. characteristic of sound varying due to amplitude (8) 4. shortest frequency (9) 5. using ultrasound to blast bladder stones (11) 6. emitted by radioactive elements (5) Down 2. heat rays (8) 3. invisible to humans but can be seen by insects (11)
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