text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE table_30057479_1 (material VARCHAR, output_power VARCHAR)
  ### Question:
  How many materials are there for output power of ~0.1 pw per cycle (calculated)?
  ### Answer:
  SELECT COUNT(material) FROM table_30057479_1 WHERE output_power = "~0.1 pW per cycle (calculated)"