Title: Anti-aircraft warfare.
Question: What was under development in both the Soviet Union and Britain in the 1930s?

Title: Insect.
Question: Do hemimetabolous insects change quickly or gradually?

Title: Egypt.
Question: What economic sectors does Egypt have?

Title: Planck constant.
Question:
If the effects are valid, for RK = n/e2, what is the measurement of KJ2RK equal to?