What is the g (μs/km)when the frequency (hz) is 100k?
CREATE TABLE "characteristics_of_telephone_cable_as_a_" (
  "frequency_hz" text,
  "r_km" text,
  "l_m_h_km" text,
  "g_s_km" text,
  "c_n_f_km" text
);
SELECT "g_s_km" FROM "characteristics_of_telephone_cable_as_a_" WHERE "frequency_hz"='100k';