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It's a wide audience, from 8-80, but leaning toward the family visit or grandparent & grandchild. Voice should be authoritative, but also comfortable and relatable. 2015-07-06 23:13:03 GMT 2015-07-13 17:00:00 (GMT -08:00) Pacific Time (US & Canada) Yes (click here to learn more about ) Closed 54 54 1 direct invitation(s) have been sent by the voice seeker resulting in 0 audition(s) and/or proposal(s) so far. Voice123 SmartCast is seeking 50 auditions and/or proposals for this project (approx.) Invitations sent by SmartCast have resulted in 53 audition(s) and/or proposal(s) so far.
Let’s visit the powerhouse to get a closer look at how it makes electricity. Water from the river flows into intake openings on the upstream side of the dam. These openings lead the water to a huge concrete cavern called the spiral case. The spiral case has curving walls that force the water to flow in a circular direction so it will spin a turbine. The flow of water moving past the turbine is controlled by large devices called wicket gates. With the water removed, you can look up at the turbine resting in place. You can also see the walls of concrete and the wicket gates that stand almost 10 feet high.
The force of water pushing against the huge turbine blades turns the turbine, which is connected by a long steel shaft to a powerful electro-magnet called a rotor. The rotor spins around a series of copper coils called a stator. The turbine and generator spin about the same rate as the crank of a bicycle being pedaled on a flat surface. When the magnetized rotor turns, the electrons inside the stator’s copper coils get excited. The electrons jump from atom to atom, creating an electrical current moving at the speed of light.
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