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Electric circuits, Current, and resistance (Chapter 22 and 23)
www.physics.brocku.catraded for a 6.0 V battery. The power dissipated by the resistoris now A. 1.0 W B. 2.0 W C. 3.0 W D. 4.0 W Multiple choice Problem 1: An electric blanket has a wire that runs through the interior. A current causes energy to be dissipated in the wire, warming the blanket. A new, low-voltage electric blanket is rated to be used at 18 V.
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www.physics.brocku.caThe earth’s angular velocity vector is ω P = z ˆ ω . We have to work out the cross product F P . coriolis = − 2 m ω P H v P , so we will need to know the cross products of the various unit vectors shown in the following figure: ωP θ . ˆ. φ φ ˆ. θ . r ˆ Using the relations
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www.physics.brocku.caViscosity and drag Drag force arises when an object moves through a fluid or, equivalently, when fluid flows past an object. In general, the drag force grows larger with increased flow velocity, but viscosity is a complex phenomenon that cannot be reduced to the simple relationship “drag force is proportional to velocity”.
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