NODE 734 — TERMINAL RELAY

{
  "type": "chime",
  "difficulty": 3,
  "n_cols": 6,
  "n_chars": 36,
  "cavities": [
    {
      "neck_area_m2": 1.378e-05,
      "neck_length_m": 0.023511,
      "volume_m3": 7.913e-05,
      "resonant_freq_hz": 146.8522
    },
    {
      "neck_area_m2": 1.77e-05,
      "neck_length_m": 0.017288,
      "volume_m3": 0.00017419,
      "resonant_freq_hz": 130.8171
    },
    {
      "neck_area_m2": 0.00042682,
      "neck_length_m": 0.026013,
      "volume_m3": 0.00024677,
      "resonant_freq_hz": 439.9901
    },
    {
      "neck_area_m2": 1.325e-05,
      "neck_length_m": 0.009118,
      "volume_m3": 9.815e-05,
      "resonant_freq_hz": 207.6227
    },
    {
      "neck_area_m2": 7.093e-05,
      "neck_length_m": 0.007347,
      "volume_m3": 0.00018295,
      "resonant_freq_hz": 391.9726
    },
    {
      "neck_area_m2": 6.462e-05,
      "neck_length_m": 0.008133,
      "volume_m3": 8.45e-05,
      "resonant_freq_hz": 523.2288
    }
  ],
  "note_base_hz": 130.81,
  "note_base_name": "C3",
  "temp_c": 12.9,
  "speed_of_sound": 339.03,
  "hint": "T = 12.9\u00b0C. Compute c = 331.3\u00b7\u221a(1+T/273.15).",
  "answer_format": "single lowercase letter"
}