Question

select law measured the springiness of air. he said \the volume of an enclosed dry gas varies inversely with its absolute pressure provided the select remains constant.\

Explanation:

The problem is about a gas law related to volume and pressure, which falls under Physics (a subfield of Natural Science). The law described is Boyle's Law, which states that the volume of a given mass of dry gas is inversely proportional to its pressure at constant temperature. So the first [Select] should be "Boyle's" and the second [Select] should be "temperature" (since the condition for Boyle's Law is constant temperature).

Answer:

First [Select]: Boyle's
Second [Select]: temperature