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)"