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What is the angular diameter of Neptune if its diameter is 50,000 km and its distance is 30 AU?
Civil Defense System
A civil defense system encompasses measures and responses designed to protect civilians and infrastructure from natural disasters, military attacks, or other emergencies.
Public Good
Goods or services available to all in society without charge, delivered by the government or private organizations, without the intention of making a profit.
Rival Consumption
A situation where the consumption of a good by one individual prevents simultaneous consumption by other individuals.
Excludable
A characteristic of a good or service where it's possible to prevent individuals who have not paid for it from having access.
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