Were there any advanced African civilizations?

Were there any advanced African civilizations? The Nok Civilization is considered to be one of the most advanced ancient sub-Saharan civilizations in African history. Beginning some time around 1500 BC, it was largely concentrated in what is now Nigeria but produced some of the first sub-Saharan iron smelting and terracotta architecture. What advanced civilizations did […]

What are different types of design patterns?

What are different types of design patterns? There are mainly three types of design patterns: Creational. These design patterns are all about class instantiation or object creation. Structural. These design patterns are about organizing different classes and objects to form larger structures and provide new functionality. Behavioral. What are the most commonly used design patterns? […]

What are the two types of body waves?

What are the two types of body waves? Body waves are of two types: Primary waves (also called P-waves, or pressure waves) and Secondary waves (S-waves, or shear waves). What type of wave is a secondary wave? elastic What type of wave is a love wave? In elastodynamics, Love waves, named after Augustus Edward Hough […]

What are the 6 economic questions?

What are the 6 economic questions? The basic questions of economics become: What to produce? How to produce? For whom to produce? What are the core principles of economics? Four key economic concepts—scarcity, supply and demand, costs and benefits, and incentives—can help explain many decisions that humans make. What are the 6 economic goals? National […]

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