Which type of power uses water and dams to produce electric energy?

Non cooperation programme was adopted in session of congress in

The two-factor theory of emotion was proposed by

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.