What are you doing when you're making sound? * 1 point a. Causing photons to travel. b. Causing air molecules to vibrate. c. Causing electromagnetic waves to radiate. d. Causing air pressure to drop.

What were some passive/non-direct ways that enslaved africans did to resist slavery?

Which groups of people most directly benefited from song innovations in the song dynasty‘s open border policy?

Which statement is a good description of a model? a) models are a description of nature based only on one or two variables. b) models are testable ideas but they are not very to most people. c) models are a description of nature that predicts more accurately than real events. d) models are an approximiation of a real system that omits all but most essential variables in a system.