What category does the secondary source and primary source fall under - Economic
- Social/Cultural
- Political
-Environment

Africans learned what the europeans wanted them to learn. instead of learning about african history and current information that could and would them they learned solely what europe wanted them to. and not everyone received the same education, some received better and others none.

The correct answer is:   [b]:   "physical systems" .

Sonar is an application of the doppler effect used by submarines.  this test was on k12.

Ithink it’s a i’m not 100 percent sure though