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In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?

The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaρv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and ρ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and ρ = 1.2 kg/m3.