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Which of the following describe possible scenarios? a) an object has zero instantaneous velocity and non-zero acceleration. b) an object has negative acceleration and is speeding up. c) an object has positive acceleration and constant velocity. d) an object has positive velocity and zero acceleration. e) an object has increasing positive position and negative velocity. f) an object has decreasing positive position and negative acceleration.

2. how much of the world's electricity currently comes from coal? select one: a. 25% b. 40%. гоо оо. с. 50% d. 75%

One way to produce electrical current is to move a wire within a a. circuit b. battery c. light switch d. magnetic field